Interstellar comet 3I/ATLAS has an ancient age, but not for the reason most commonly touted. These three lines of evidence are…
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With targets from all across the Universe, focusing a space telescope — with so many moving parts — is challenging, but…
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Despite their rarity, boron and beryllium can both be detected within white dwarf atmospheres. What does their presence and abundance… Continue…
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Once you cross over to the inside of an event horizon, you can never come out again. But then, how do…
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Oort cloud object Bernardinelli–Bernstein has the largest known cometary nucleus: 119 km wide. An impact with Earth would be catastrophic. Continue…
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Vast arrays of planets, stars, black holes, galaxies, and more populate our Universe. Within each category, differences can be astounding. Continue…
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Protons and neutrons are composite structures: made of quarks and gluons. But knowing they had substructure goes back long before that.…
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In 2016, humanity announced our first successful gravitational wave detection. 10 years and 389 events later, here’s how far we’ve come.…
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Two discrete symmetries, charge conjugation and parity, must be violated together for our Universe to exist. We haven’t found enough of…
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Despite all that we’ve discovered, Earth remains the only planet definitively known to possess life. Here’s how to find a second…