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Scientists Discover The Origins Of A 23-Million-Year-Old Asteroid That Hit Earth

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. ....

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A gargantuan supernova remnant looks 40 times as big as the full moon


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 ( ....

United Kingdom , Roberto Colombari , Roger Chevalier , Robert Gendler , John Raymond , Robert Fesen , Peter Mccullough , Dartmouth College , Space Telescope Science Institute In Baltimore , University Of Virginia , Harvard Smithsonian Center , Sky Survey , Milky Way , Digitized Sky Survey , Space Telescope Science Institute , ஒன்றுபட்டது கிஂக்டம் , ரோஜர் செவாலியர் , ராபர்ட் கெண்டிலேர் , ஜான் ரேமஂட் , ராபர்ட் பேசேன் , பீட்டர் ம்க்கல , டார்ட்மவுத் கல்லூரி , இடம் தொலைநோக்கி அறிவியல் நிறுவனம் இல் பால்டிமோர் , பல்கலைக்கழகம் ஆஃப் வர்ஜீனியா , ஹார்வர்ட் ஸ்மித்சோனியன் மையம் , வானம் கணக்கெடுப்பு ,