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 ...

Today in the history of astronomy, Valentina Tereshkova parachutes into history books.

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

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

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

Southern astronomers get to see the Milky Way’s core overhead and enjoy many star clusters and nebulae that are hidden for us ...

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

M22 is one of the brightest and nearest globular clusters to Earth, located near the top of the Sagittarius Teapot.

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

On June 17, in the year 2 B.C.E, a significant planetary conjunction occurred involving Venus and Jupiter. From Earth’s perspective, these two bright planets appeared to draw so close that they would ...

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