One of Lord Rosse’s greatest discoveries was the spiral structure of the Whirlpool Galaxy (M51). He also made a sketch of a ...

When the Sun runs expands into a red giant, it will swallow the inner solar system and raise the temperature in the outer ...

Few galaxies are really bright and oriented almost exactly edge-on to our line of sight. One of these is NGC 5907: the ...

Axiom 4 delayed amid ISS issues; here’s what’s launching from June 16–22, including Blue Origin’s NS-33 and multiple Starlink ...

NASA budget proposal slashes science funding by 47%, putting more than 40 current and planned missions at risk.

See two similarly bright celestial objects with different colors pair up in the evening sky.

The Red Planet stands less than a degree from Leo the Lion’s brightest star in the evening sky tonight, visible in the west.

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

Today in the history of astronomy, an eclipse record helps illuminate the timeline of the ancient world.

Inflation and budget issues are threatening to hobble NASA’s most in-demand telescopes.

The Whirlpool Galaxy (M51) and its smaller companion NGC 5195 are excellent targets tonight before the Moon rises.

Wachmann, also known as Schwassmann-Wachmann 1, glows at 13th magnitude near Leo’s forefoot early this evening.