What's up in
Universe
Astronomy, cosmology, stars, planets, black holes and the observatories revealing how the cosmos works.
Sun-watching satellite discovers 5,000 comets with help from citizen scientists
Pluto observations suggest its atmosphere may be starting to thin
Rare planet pair 337 light-years away offers test of alien atmospheres
Astronomers clash over whether distant supernovae are systematically mismeasured
Timing error may have invented the first polar planet candidate
Mercury is closest to Earth, not Venus, when you do the math right
Seventy years of searching for alien life yields only fragments, no proof
Dead stars mysteriously refuse to dim after eight billion years
In May 2024, the Gannon geomagnetic storm—the strongest in more than two…
Kepler found 2,600 worlds by staring at the same stars for four years
