But some on social media claim a much more alarming celestial body is also headed our way. On this Wikipedia the language links are at the top of the page across from the article title. The Bernardinelli-Bernstein comet was one of those objects. With millions of years separating the comet's next close approach from its following one, it'll be a once-in-a-lifetime brush with the early solar system. media-tech companies with hubs around the world. document.querySelector("#ads").addEventListener('click',function(){ 2023 USA TODAY, a division of Gannett Satellite Information Network, LLC. He holds a bachelor's degree in creative writing from the University of Arizona, with minors in journalism and media arts. When you fold in all three of these effects, you wind up finding that most impacts will occur with a range of speeds, but generally fall between 50 and 60 km/s, or around triple the speed that an asteroid impact typically possesses. These giant comets are thought to have been scattered to the far reaches of the solar system by the migration of Jupiter, Saturn, Uranus and Neptune early in their history. However, the record-breaking Bernardinelli-Bernstein is projected to slingshot back towards the Oort Cloud where it originally hails from before it reaches Saturn, scientists assure. eventCategory: event.slot.getSlotElementId(), Our Solar Systems outer reaches, and whats in them, was predicted long before the first Oort Cloud object was ever discovered. da Silva), 8 ways we know that black holes really do exist, Largest asteroid ever to hit Earth was twice as big as the rock that killed off the dinosaurs, 30 of the world's most valuable treasures that are still missing, In rare case, mother delivers two sets of identical twins, back to back, Rare black hole 1 billion times the mass of the sun could upend our understanding of galaxy formation, 3 million years ago, this brutish giant petrel likely eviscerated dead seals with its knife-like beak, The early universe was crammed with stars 10,000 times the size of our sun, new study suggests, Giant ancient fish that likely preyed on humans' ancestors unearthed in South Africa, 'Brain-eating' amoeba case in Florida potentially tied to unfiltered water in sinus rinse, The ultimate action-packed science and technology magazine bursting with exciting information about the universe, Subscribe today and save an extra 5% with checkout code 'LOVE5', Engaging articles, amazing illustrations & exclusive interviews, Issues delivered straight to your door or device. [1][14] The earliest precovery observations of 2014 UN271 were obtained from Paranal Observatory's VISTA survey images taken on 15 November 2010, when the object was 34.1AU (5.1billionkm; 3.2billionmi) from the Sun. Now, researchers have studied the massive comet in more detail, and they have new estimates about its journey toward the sun. Even though they have a large nucleus, comets such as, The planets have eccentric orbits, so heliocentric distances, While a loosely bound long-period comet such as, Category:C/2014 UN271 (BernardinelliBernstein), List of Solar System objects by greatest aphelion, "MPEC 2021-M83: COMET C/2014 UN271 (BernardinelliBernstein)", "Giant Comet Found in Outer Solar System by Dark Energy Survey", "C/2014 UN271 (BernardinelliBernstein): The Nearly Spherical Cow of Comets", "JPL Horizons On-Line Ephemeris for 2014 UN271 at epoch 1600 and 2500", "Perihelion in January 2031 (1 minute interval)", "JPL Small-Body Database Browser: C/2014 UN271 (BernardinelliBernstein)", "Diameter and rotational period of Comet C/2014 UN271 (Bernardinelli-Bernstein)", "Hubble Space Telescope Detection of the Nucleus of Comet C/2014 UN271 (BernardinelliBernstein)", "Size and albedo of the largest detected Oort-cloud object: comet C/2014 UN271 (BernardinelliBernstein)", "Illustration of Comet BernardinelliBernstein", "A search of the full six years of the Dark Energy Survey for outer Solar System objects", "Huge Oort Cloud object has been spotted entering the solar system", "Distance from Sun from 2010 to 2023 (1 month interval)", "New- And Old-Style Minor Planet Designations", "Newly discovered object 2014 UN271 observed as active at 20.18 au", "Comet C/2014 UN271 (BernardinelliBernstein) exhibited activity at 23.8 au", "Early Activity in Comet C/2014 UN271 BernardinelliBernstein as Observed by TESS", "A Remarkable Inbound Long-Period Comet at Record Heliocentric Distances", "Determining the coma contents of the incoming Oort Cloud comet C/2014 UN271", "Apparent Outburst of Comet C/2014 UN271 (BernardinelliBernstein)", "Occultation by the Big Comet C/2014 UN271 from the Oort Cloud predicted for Sun 19th September at 2:45am AEST Sydney time", "The 'megacomet' BernardinelliBernstein is the find of a decade. Bernardinelli-Bernstein is a billions-of-years-old relic from the chaotic origins of our solar system. The animation depicts a mapping of the positions of known near-Earth objects (NEOs) at points in time over the past 20 years and finishes with a map of all known asteroids as of January 2018. Now, remember that it comes to us not from somewhere between the orbit of Mars and Jupiter, like asteroids do, but rather from the Oort cloud, and youve got a recipe for an unprecedented disaster. hitType: 'event', Estimates for the Oort Cloud's mass vary widely, reaching as high as 20 times Earth's mass. On average, the Earth is hit by . It will make a close approach to Saturn's orbit in a decade. Monster rock hurtling towards solar system, What is the Quadrantid meteor shower? The camera, also known as DECam, is helping to map 300 million galaxies across the night sky but it also captures glimpses of comets and trans-Neptuinan objects, or icy celestial bodies that reside along the outskirts of the solar system, beyond Neptunes orbit. Despite being so far away, its impressive dimensions are what caught the researchers' eyes. The. [9] Given the minimum estimated diameter (119km) and absolute magnitude, the nucleus is calculated to have a very low visual geometric albedo up to 4.4%1.2%, meaning that it reflects only 4.4%1.2% of visible lightmaking its surface darker than coal. [12], C/2014 UN271 was observed by the Hubble Space Telescope in January,[23][9] March, July, August, and October 2022. [9], Even at its minimum estimated diameter, C/2014 UN271 is the largest Oort cloud comet discovered, being more than 50 times larger than a typical comet which is less than 2km (1.2mi) in diameter. Comet Bernardinelli-Bernstein was found in six years of data collected by the Dark Energy Camera, which is located on the Vctor M. Blanco 4-meter Telescope at Cerro Tololo Inter-American Observatory in Chile. Could we save Earth, today, from a similar event? hitType: 'event', All aboard! [10][43], Optical observations of C/2014 UN271 during its inbound passage show that its nucleus appears more reflective at longer wavelengths, indicating a moderately red color similar to (albeit slightly less red than) most long-period comets. [18][1] At that time, the comet's distance from the Sun was 20.2AU (3.0billionkm; 1.9billionmi). It has a diameter of approximately 150 kilometres and a mass 10 times that of the Hale Bopp . "We conclude that BB is a 'new' comet in the sense that there is no evidence for [a] previous approach closer than 18 AU," the researchers wrote in their study; in other words, humans have never laid eyes on it before. A Warner Bros. It was discovered in 2010 by astronomers Pedro Bernardinelli and Gary Bernstein. An object that falls into the inner Solar System from the Oort cloud is going to gain speed primarily owing to the gravity of the Sun. Notifications can be turned off anytime from browser settings. Comet Bernardinelli-Bernstein is already closer to the sun than Neptune, but scientists are assuring us that it is absolutely no threat to our planet. }); This frigid object, dubbed Bernardinelli-Bernstein, is the largest comet ever spotted. These tails can be hundreds or even millions of miles in length. Discovery Company. The previous largest known long-period comet was C/2002 VQ94 (LINEAR) with a diameter of 96km (60mi),[35] followed by Comet HaleBopp at 74km (46mi). A series of smaller impacts would still be bad, both for humans and all creatures on Earth, but it would lead to a much less risky set of outcomes for Earths oceans and atmosphere. Comet Bernardinelli-Bernstein has an aphelion of just under 1 light-year, suggesting that the Oort cloud is at least that large. eventAction: 'view' It brightened by 0.65 magnitudes compared to images taken earlier that day, and reached an apparent magnitude of 18.9. Similar postson Facebook claim "scientists" say the mega cometis "approaching Earth." Getting a closer look at the rock could help scientists understand a bit more about the chemical composition of the early solar system, as comets from deep in the Oort cloud are thought to be relatively unchanged since they were booted away from the sun billions of years ago. Comet Bernardinelli-Bernstein was named on June 24 after Pedro Bernardinelli Gary Bernstein - the two astronomers who discovered it. The massive core (or nucleus) of Comet Bernardinelli-Bernstein is predicted to be more than 62 miles (100 kilometers) in diameter, which is three times larger than the next-largest comet. Estimated to be 80 miles across and with a mass of 500 trillion. Comet C/2014 UN271 is the official name of the comet, but it's commonly known as Comet Bernardinelli-Bernstein after its discoverers, Pedro Bernardinelli and Gary Bernstein, both of the University of Pennsylvania. Astronomers Pedro Bernardinelli and Gary Bernstein first. (Credit: NASA/Don Davis) Measuring an estimated 80 miles across, its icy core is 50 times larger than that of any known comets in history, while its mass about 500 trillion tons is still 100,000 times more massive than our typical passing comets, according to new findings published Wednesday in the Astrophysical Journal. It is therefore up to artists to create their own ideas of what the comet's surface might look like, based on the scientific information we have about it. [6] The current 3-sigma uncertainty in the comet's distance from the Sun is 35,000km. Measuring somewhere between 62 and 230 miles in diameter, Comet Bernardinelli-Bernstein is one of the biggest comets that has ever been found and is even 10 times larger than the asteroid. Comet Bernardinelli-Bernstein is currently about 1.8 billion miles (3 billion kilometers) away about the distance of Uranus from the sun and at its closest point in 2031, it will be just a bit more than Saturns distance to the sun. USA TODAY has reached out to the posters for comment. [g], C/2014 UN271 was discovered by astronomers Pedro Bernardinelli and Gary Bernstein in an algorithm-assisted search for slowly-moving trans-Neptunian objects, in archival images from the Dark Energy Survey (DES) at Cerro Tololo Inter-American Observatory. Even with a much lower density, as comets are typically at around 0.6 grams per cubic centimeter, the enormous size of this object translates into a fantastically large mass. Thanks for contacting us. If comet Bernardinelli-Bernstein remained intact, as a solid object, it would completely break and rearrange the crust everywhere across Earths surface, similar to what many theorize occurred on the surface of Mars when its original, large, third inner moon fell back onto the red planet, creating the wacky Martian topography we see today. Earth, as well as all planets and moons with rocky surfaces, has experienced a large number of collisions from objects of extraterrestrial origin. The comet Bernardinelli-Bernstein, discovered by two astronomers has now grabbed the headlines as the biggest one to be discovered to date. !. Even though its size is now thought to be only 74 miles across based on Hubble data, its still the largest comet nucleus ever observed. It will then zip back out to the distant regions of our solar system. Yes, the Earth would be covered in a pall of ash that blocked out the Sun, possibly for months at a time, and much of life on Earth would go extinct due to the lack of sunlight. All told, when we do the math, we find that an impact between comet Bernardinelli-Bernstein and Earth would release a total amount of energy thats right around 1028 J. June 7, 2022 at 6:30 am. Live Science is part of Future US Inc, an international media group and leading digital publisher. [42], Without its coma, the nucleus of C/2014 UN271 has a visual (V-band) absolute magnitude of 8.630.11, which is calculated from its distance and apparent magnitude. [27], Rigorous computations of C/2014 UN271's orbit and ephemeris have identified few potential occultation events by the comet from 20212025, during which the comet would pass in front of a bright star and briefly block out the star's light. The Oort Cloud is located between 2,000 and 100,000 astronomical units from the sun. ga('ads.send', { "We conclude that BB is a 'new' comet in the sense that there is no evidence for [a] previous approach closer than 18 AU," said the researchers. It is projected to swing by Saturn's orbit . if(document.querySelector("#google_image_div")){ the rushing of sub-crustal magma up to the surface and even a possible re-surfacing event. 2023 Cable News Network. window.adsContainer = {"position2":{"code":"Article_Mobile_Above_Next_Rel","max_width":300,"max_height":250},"position3":{"code":"Article_Mobile_300x250_ATF_Rel","max_width":300,"max_height":250},"position4":{"code":"Article_Mobile_Middle_Rel","max_width":300,"max_height":250},"position5":{"code":"Article_Mobile_Middle1_Rel","max_width":300,"max_height":250},"position6":{"code":"Article_Mobile_Middle2_Rel","max_width":300,"max_height":250},"position7":{"code":"Article_Mobile_Middle3_Rel","max_width":300,"max_height":250},"position8":{"code":"Article_Mobile_Middle4_Rel","max_width":300,"max_height":250},"position9":{"code":"Article_Mobile_Middle5_Rel","max_width":320,"max_height":250},"position10":{"code":"Article_Mobile_Middle6_Rel","max_width":320,"max_height":250},"position11":{"code":"Article_Mobile_Middle7_Rel","max_width":320,"max_height":250},"position12":{"code":"Article_Mobile_Middle8_Rel","max_width":320,"max_height":250},"position13":{"code":"Article_Mobile_Middle9_Rel","max_width":320,"max_height":250},"position14":{"code":"Article_Mobile_Middle10_Rel","max_width":320,"max_height":250},"position15":{"code":"Article_Mobile_Middle11_Rel","max_width":320,"max_height":250},"position16":{"code":"Article_Mobile_Middle12_Rel","max_width":320,"max_height":250}} Subscribers will get the newsletter every Saturday. Did you encounter any technical issues? It is now thought that our Moon was formed by an early collision with Earth that created such a phenomenon, something that science is still revealing the details of today. [1][i], Analysis of archival images from NASA's Transiting Exoplanet Survey Satellite (TESS) show that C/2014 UN271 had an extensive, diffuse coma at least 43 arcseconds wide in observations as early as September 2018, when it was 23.8AU (3.6billionkm) from the Sun. And Comet Bernardinelli-Bernstein, currently on its way into the Solar System from more than half a light-year away, is nowhere near comparable mass to the K-Pg impactor. At its closest point in 2031 it's still expected to be about a billion miles away from us. Sign up for CNNs Wonder Theory science newsletter. At a size of 100 kilometers, this comet is ten times the one that exterminated the dinosaurs on Earth. The tremendousmass of ice, rockand space dust named Comet Bernardinelli-Bernstein after its discoverers Pedro Bernardinelli and Gary Bernstein of the University of Pennsylvania is definitely real. }); Despite its impressive dimensions, this comet named C/2014 UN271 (Bernardinelli-Bernstein) after its two discoverers will be visible to the naked eye for only a brief time. 2. As a reference point, the object that struck the Earth 65 million years ago, causing what we historically know as the fifth great mass extinction, was almost certainly an asteroid and not a comet. An illustration of the massive comet Bernardinelli-Bernstein, (Image credit: NOIRLab/NSF/AURA/J. The team announced the discovery in June. The comet will reportedly pass just outside the orbit of Saturn a distance of 10.97 AU of the Sun. While that's far enough from Earth that humans won't be able to see the comet without telescopes, it's considerably closer than the rock's last visit to our part of the solar system. A giant comet from the outskirts of our solar system has been discovered in six years of data from the Dark Energy Survey. Comet Bernardinelli-Bernstein comes from the Oort Cloud, a spherical cloud of icy objects from 50,000 to 100,000 AU from the Sun that surround the Solar System. [3] Less abundant supervolatile substances such as carbon monoxide (CO) are likely present in C/2014 UN271 and may additionally contribute to its distant activity, but their emissions remain yet to be detected. The one possible saving grace, however, is this: a comet this large, that approaches Earth from the Oort cloud, will experience substantial tidal forces from Earths gravity, and may be torn apart into a series of smaller fragments. } It is barreling . Comet Bernardinelli-Bernstein, the largest comet ever discovered, has a nucleus that's approximately 119 kilometers across. A large enough impact, one that imparted enough energy to our world, would be capable of gravitationally unbinding it, but that would require about 20,000 times more energy than a collision between Earth and comet Bernardinelli-Bernstein. If such an object were to strike Earth, the energy imparted to. [16][2] The object's relatively high brightness from its distance indicated that its diameter must be on the order of 100km (62mi)an exceptionally large size for an object of cometary origin. From Alcor to Zappafrank: How the stars and other celestial objects got their names. And remember: kinetic energy depends on the velocity squared, so three times the speed means nine times the energy. [10] The low albedos of cometary nuclei are generally attributed to the deposition of carbon, organic compounds, and sulfides produced by cosmic rays dissociating molecules on the nucleus's surface. The comet, known as the Bernardinelli-Bernstein comet (or C/2014 UN271, in astro-speak), is at least 62 miles (100 kilometers) across about 1,000 times more massive than a typical. This illustration shows Comet Bernardinelli-Bernstein as it might look in the outer Solar System. "A 62-mile wide 'Mega-Comet' has just entered our solar system," reads a graphic shared in a July 22 Instagram post. The large comet has likely always been in our solar system, as scientists believe it originated from a distant part of the solar system known as the Oort Cloud. [3][20] Between the 2018 and 2020 TESS observation epochs, the comet's brightness had significantly increased by 1.5 magnitudes, likely as a result of continuous activity rather than a spontaneous outburst. ADVERTISEMENT Although headed towards our solar system, scientists believe that the Bernardinelli-Bernstein comet will not harm Earth. Baby Mia Jade Riley: Parents Lani and Tom Riley speak out after dog attack killed their 5-week-old infant, Kyle Sambrook: Hiker falls 100ft to death while carrying his dog in one hand through 'appalling' weather, Bruce Willis's mom Marlene 'not sure if her son still recognizes her' as 'aggressiveness' creeps in, Julia Faustyna: 21-yr-old girl who claims to be Madeleine McCann admits to making 'pornographic videos' in past, 'End this crazy show': Julia Wandelt may seek court's help for DNA test to prove she is Madeleine McCann. The comet . Comet Bernardinelli-Bernstein is currently about 1.8 billion miles (3 billion kilometers) away - about the distance of Uranus from the sun - and at its closest point in 2031, it will be just. Given that comet Bernardinelli-Bernstein is more than ten times the diameter of the suspected K-Pg impactor, it comes in with more than 1000 times the volume, giving it an estimated mass of somewhere around 5 1017 kg, and possibly more. They found the asteroid is about 1181 feet (360 meters) across and reflects about 30% to 50% of the light that. [14][15] When first imaged by the DES, the object was located in the southern constellation Sculptor, inside the orbit of Neptune at a distance of 29.0AU (4.3billionkm; 2.7billionmi) from the Sun. New York, comets Share Improve this question Follow [6][45] It will make its closest approach to Earth around 5 April 2031 at a distance of 10.1AU (1.5billionkm; 0.94billionmi). The comet was first discovered by the Dark Energy Survey project. the possible ejection of large portions of all three. [9], C/2014 UN271 came from the Oort cloud and has been inside of the orbit of Neptune (29.9AU) since March 2014 and passed inside the orbit of Uranus (18.3 AU) in September 2022. appreciated. [10], The rotation period of 2014 UN271's nucleus is disputed, as some studies found no significant rotational periodicity in its light curve. If the wrong series of gravitational encounters occurs, a direct hit would be the most catastrophic event to occur since impact that led to the formation of our Moon. But by the time they do, their power sources will have been dead for centuries. The more mass and the greater the speed of an object, the more damage it can do to Earth in the case of an impact. Comet Bernardinelli-Bernstein has been falling toward the sun for over 1 million years. In 2031, the comet will make its closest approach at a distance of about 11 times the Earth-Sun distance. Although headed towards our solar system, scientists believe that the Bernardinelli-Bernstein comet will not harmEarth. To watch the comet from the earth, which is set to arrive in 2031, one has to use a telescope. In general, if you had an object strike the Earth that was on the order of a kilometer in diameter or more, it would pose the type of existential threat that would not only bring an end to human civilization, but to a tremendous fraction of the species currently extant on Earth today. } gads_event = event; Similarly, the Moons additional gravity makes impacts on the Earth-Moon system more likely, increasing the collision rate with Earth by an even greater amount than the Moon absorbs impacts, despite its plethora of craters. Astronomers hope that studying Comet Bernardinelli-Bernstein could reveal. on Facebook, Share What happens if the Solar Systems largest comet collides with Earth? This is the same telescope that discovered 2020's favorite comet, Comet NEOWISE. [31][32][33] Even if it reaches the magnitude of Pluto, it will require about a 200mm telescope to be visually seen. [10] The ALMA measurements have not ruled out the possibility of a dust coma contaminating up to 24% of the nucleus's thermal emission, so the actual diameter may well be smaller. Now an expected discovery has been examined by the NASA's Transiting Exoplanet Survey Satellite (TESS) team about the BB comet. Whereas each and every one of those fragments impacted Jupiter, however, Earths gravitational pull is substantially lower than that of Jupiter. Whatever wasnt either boiled off by the Sun or locked up into the planetary, lunar, asteroidal, or Kuiper belt objects we have today remained in a spheroidal cloud, anywhere from a thousand times the Earth-Sun distance to one or two light-years away. The odds are slim, but the consequences would be devastating. With an observation arc of several years using dozens of observations, the orbit of C/2014 UN271 is securely known. The huge "mega" comet C/2014 UN271 (Bernardinelli-Bernstein) 80 miles wide is coming towards Earth from the edge of our Solar System. Thank you for supporting our journalism. A mega-comet spotted in 2021 is now the largest ever seen according to observations by scientists using the Hubble Space Telescope. As the comet continues to get closer to Earth over the next 9 years, our size estimates for this terror-inducing behemoth should only become more precise. Although Jupiter absorbs many asteroids and comets, it can also redirect them, potentially further endangering the Earth. Plants are very sensitive to touch, with research showing that touching a plant can change its genome and launch a cascade of plant hormones. Here's how you can view the celestial light show, Aurora Borealis aka Northern Lights: How, where and when to watch the splendor of awe-inspiring phenomenon in US. While we could discover as it gets closer that it's actually even larger, this doesn't change what astronomers are sure of: The itinerant comet is unlikely to harm our planet. Known as Bernardinelli-Bernstein, the comet is at least 100 kms across, making it at least 1,000 times larger than most comets ever witnessed by humans. What if the 62 km in size Comet hit the Earth! The comet has been. On June 19, the center confirmed that the object was a new discovery. At this time the comet was 25 times farther from the Sun than Earth, and too cold to produce a coma, or tail, that would be easily visible. Comet Bernardinelli-Bernstein, so named because it was found by University of Pennsylvania department of physics and astronomy graduate student Pedro Bernardinelli and Professor Gary Bernstein, is between 62 to 124 miles (100 to 200 kilometers) across. The nearly spherical cow of comets, they stated in the title of their paper, which they submitted for publication in The Astrophysical Journal Letters on September 23. New data show that a comet discovered in 2014 is one for the record books. The true extent of the outer Oort Cloud may be under 1 light-year, or greater than 3 light-years; there is a tremendous uncertainty here. The comet was spotted with the Hubble Space Telescope. [3], The discovery was announced by the Minor Planet Center on 19 June 2021, and the object was given the minor planet provisional designation 2014 UN271. This is comparable in size to the recently discovered Bernardinelli-Bernstein "mega comet," thought to be the largest in recorded history. Intimidatingly described by one researcher as big and blacker than coal, the comet Bernardinelli-Bernstein (C/2014 UN271) has spent the past million years hurtling 22,000 miles per hour towards the center of our solar system and is expected to reach just short of Saturns orbit by 2031. Comet Bernardinelli-Bernstein is estimated to be about 1000 times more . The gigantic icy object is the most distant comet ever found and will be visible from Earth in 2031, according to new research. We must stay ever vigilant, as our extinction is always just one rogue object away. and come to Earth from much less far away than comets do, making a direct hit more likely. hitType: 'event', The comet was first observed in 2010 and is also known as Comet Bernardinelli-Bernstein in honor of its discoverers. Our planet was hit by a meteorite about six miles wide at that time the blast wave from the collision went around the earth several times. 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Some on social media claim a much more alarming celestial body is headed. Size comet hit the Earth. not harmEarth an illustration of the page across from the chaotic origins our... Headed our way has to use a telescope Instagram post of 100 kilometers, this comet is ten times Earth-Sun. Posters for comment June 19, the comet will not harmEarth been discovered six! Cometis `` approaching Earth., comet NEOWISE University of Arizona, with minors journalism... Of about 11 times the Earth-Sun distance How the stars and other celestial objects got their names must stay vigilant. Meteor shower record books years using dozens of observations, the center that. Objects got their names astronomers who discovered it June 24 after Pedro Bernardinelli Gary Bernstein - the astronomers! Object is the largest ever seen according comet bernardinelli bernstein hit earth observations by scientists using the Space! Shows comet Bernardinelli-Bernstein, discovered by two astronomers who discovered it live Science is part of Future Inc... Point in 2031, one has to use a telescope 11 times the energy imparted.. Comet Bernardinelli-Bernstein in honor of its discoverers slim, but the consequences would devastating... Shared in a decade much more alarming celestial body is also known as comet Bernardinelli-Bernstein discovered... Km in size comet hit the Earth Bernardinelli Gary Bernstein now, researchers have studied the comet. The Dark energy Survey project 62-mile wide 'Mega-Comet ' has just entered our solar,!
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