Ancient explosive volcanic eruptions on Mars could help explain mysterious hints of buried ice from the Red Planet's equator, a new study finds.
Astronomers with the Event Horizon Telescope (EHT) made history in 2019 by producing the first image of a black hole. The object in question was the supermassive black hole (SMBH) at the center of M87, a supergiant elliptical galaxy about 53.5 million light-years distant in the constellation Virgo. This was followed in 2022 with the first-ever image of Sagittarius A*, the SMBH at the heart of the Milky Way galaxy. Now, in another first, astronomers have observed a pair of black holes orbiting each other in quasar OJ287, an Active Galactic Nucleus (AGN) located 4 billion light-years away in the constellation Cancer.

