Bright Venus and tiny Mars come to conjunction low in the western twilight, as the crescent Moon stands watch. On the other side of the sky, Saturn and Jupiter rise after dark. And before moonlight comes back, delve the deep sky in Scorpius and Sagittarius.
New measurements from NASA’s Curiosity rover show that methane concentrations near the Martian surface vary on a daily cycle. The finding could help reconcile conflicting data.
Astronomers find more bright spots underneath Mars's south polar cap, but could they really be subterranean lakes?
Bright Venus and faint little Mars close in on each other low in the western twilight. Scorpius, laden with interesting stars and deep-sky targets, is highest in the south right after dark. Sagittarius, even richer, follows behind. Saturn and Jupiter rise in late evening.
Summer only lasts so long. Like everything, it's transient. That will be our theme as we explore wispy noctilucent clouds, a nova that can't sit still, and a supernova in NGC 5427 in Virgo.
Two new detections give astrophysicists a novel look at how stellar remnants pair up.
A study of 36 dwarf galaxies within a volume of space spanning 13 million light-years show they all have remarkably similar histories despite the vast distances between them.
Astronomers have discovered a new comet coming from the Oort Cloud — and it appears to be a big one.
If today’s solar eclipse has you wondering when the next one will cross the continent, start planning now for a stellar trip around October 14, 2023.