NASA’s Fermi Gamma-ray Space Telescope might have detected a burst from the same merging black holes that emitted the gravitational waves LIGO detected. Or not.
Astronomers using the ALMA array of radio dishes have detected a dwarf galaxy 4 billion light-years away by the pull of its dark matter.
The waning gibbous Moon joins Saturn and Mars in early morning skies, and Jupiter is high at nightfall.
The recurrent nova T Coronae Borealis last made a splash just after World War II. Does its current restive state hint at an imminent outburst?
It doesn’t happen often, but soon you’ll be able to “spot the spot” – Mercury’s silhouette – as the innermost planet crosses the Sun’s disk. The next transit of Mercury won’t occur until 2019.
In this month’s guided tour of the night sky, find Mars and Saturn near each other before dawn, while Jupiter and Mercury join the fading constellations of winter in the evening sky after sunset.
Our state-of-the-art representation of the entire celestial sphere lets you explore the stars above as never before.
Join Sky & Telescope Observing Editor JR Johnson-Roehr for our fourth annual trip to Iceland to see the northern lights.