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While scientists have managed to recover and examine thousands of meteorites, finding their origin or even whether they are from icy comets or rocky asteroids has proved elusive. Now, for the first time, a team of international researchers has traced the source of a boulder-sized rock that landed in Botswana to an asteroid named Vesta. Boasting a diameter of about 300 miles, it is one of the largest and brightest rocks in the asteroid belt that circles the sun between Jupiter and Mars.
Once upon a time a small asteroid broke off of its parent space rock – and smashed into Earth 23 million years later as. Now, scientists know where it originated - from Vesta, the second-largest asteroid in our solar system.
March 17, 2021 at 6:00 am
A cloud of expanding gas in space is the largest supernova remnant ever seen in the sky, a new study confirms.
The Milky Way has some 300 known supernova remnants, each made of debris from an exploded star mixed with interstellar material swept up by the blast. This supersized one, located in the constellation Antlia, isn’t necessarily the biggest of all physically, but thanks to its proximity to us, it
looks the biggest. As seen from Earth, it spans a region of sky more than 40 times the size of a full moon, astronomer Robert Fesen of Dartmouth College and his colleagues report February 25 at arXiv.org. The Antlia remnant appears about three times as large as the previous champion, the Vela supernova remnant (