NASA today revealed that it has teamed up with the European Space Agency (ESA) to, for the first time, measure the spin rate of a supermassive black hole. Using NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) and the ESA’s XMM-Newton, astronomers …

NASA announced this week that it has joined the European Space Agency’s (ESA) Euclid mission. The mission will investigate dark matter and dark energy throughout the universe. In 2020, the mission will launch the Euclid space telescope, which will spend …

Astronomers have used NASA’s Spitzer Space Telescope to obtain the most precise measurement yet of the Hubble constant, which is the rate at which the universe is expanding. The Hubble constant is named for Edwin Hubble, the astronomer who discovered …