Germany gave astronomy its planetary laws, its first measured star distance, the sighting of Neptune and the first picture of…
On August 15, 1977, a radio telescope in Ohio recorded 72 seconds of a narrow, powerful signal near the hydrogen…
Around 105 women have flown to space. Out of everyone who has ever left the planet, that’s fewer than 15%.…
Gravitational lensing happens when matter sits between a distant light source and you, and its gravity bends the light on…
Contents TLDR: which planetarium should you visit? Arkansas has few planetariums, and fewer of them take walk-ins. Here is the…
TLDR Table of contents Canada has a small astronomy community and a long list of results that people outside Canada…
Contents What is a binary star? A binary star is a pair of stars held together by gravity, each orbiting…
A neutron star is the collapsed core of a massive star that blew up as a supernova: about 1.4 times…
TLDR Table of contents What is an ocean planet? An ocean planet is a planet or moon with a global…
An interactive 3D Sun. See today’s real NASA image with NOAA’s sunspot regions pinned on it, then cut it open to explore the core, convection zone, photosphere, chromosphere and corona.