A cloud of energetic gas lit up by a collision of galaxies spans nearly 20 million light-years, leading astronomers to ...

Here’s an oddball open star cluster I bet you’ve never seen — it’s catalogued as Pismis-Moreno 1. Lying at a high declination ...

Polaris, which lies roughly 430 light-years from Earth, marks the end of the Little Dipper’s handle. Alternatively, it’s the ...

Earth’s companion has allowed astronomers to define lunar cycles, navigate without technology, and understand celestial ...

Eugene Parker, pioneer of theoretical solar and plasma astrophysics, was born June 10, 1927. Parker revolutionized the field ...

A nearly Full Moon passes close to the ruby-red star at the heart of the Scorpion, visible in the early-morning hours.