Astronomical Journal

Exoplanet stepping stones

Astronomers have gleaned some of the best data yet on the composition of a planet known as HR 8799c—a young giant gas planet about 7 times the mass of Jupiter that orbits its star every 200 years.

dateNov 20, 2018 in Astronomy
shares161 comments 2

NASA Learns More About Interstellar Visitor 'Oumuamua

In November 2017, scientists pointed NASA's Spitzer Space Telescope toward the object known as 'Oumuamua—the first known interstellar object to visit our solar system. The infrared Spitzer was one of many telescopes pointed ...

dateNov 14, 2018 in Astronomy
shares664 comments 21