Large observatories will require precise timing info to measure as many exoplanet atmospheres as possible. Backyard astronomers have the power to keep that intel fresh.
The NASA spacecraft detected signs of hydrated minerals on Bennu's surface, suggesting that the asteroid's larger parent body once hosted liquid water.
This week in astronomy news: Inflated helium atmospheres surround two exoplanets, and the Kepler Space Telescope captures the moments around a supernova that hint at a companion star triggering the explosion.
Nearly 11 billion years ago, the universe churned out stars at a rate 10 times greater than today. And yet all the starlight in the cosmos appears no brighter on the sky than a 60-watt light bulb seen from miles away.
In astronomy news this week: The most luminous quasar known in the cosmos is devouring three galaxy companions, while a newly discovered ghostly satellite of the Milky Way hints at hordes more just waiting to be found.
In astronomy news this week: A gargantuan supercluster of galaxies lurks in the early universe, while data from the Fermi telescope hint at two supermassive black holes locked in a gravitational dance.
A massive star lost most of its mass before exploding and creating a neutron star — and a second nearby neutron star might have been the thief.