What is the galactic tide?
A galactic tide is a tidal force experienced by objects subject to the gravitational field of a galaxy such as…
Astronomy
The albedo in Astronomy
The albedo in astronomy is the fraction of light that is reflected by a celestial object that does not shine…
The Frosty Leo Nebula
The Frosty Leo Nebula (also known as IRAS 09371+1212) is a proto-planetary nebula, located at a distance of around 10,000…
A 212-Hour Exposure of Orion
The constellation of Orion is much more than three stars in a row. It is a direction in space that…
Cassiopeia A
Cassiopeia A (abbreviated to Cas A and also known as SN 1671) is a supernova remnant (SNR), located at a…
All about Arp 147
Arp 147 is a pair of interacting galaxies 400 million light years away from Earth, visible in the constellation Cetus….
The Elephant’s Trunk Nebula
The Elephant’s Trunk Nebula is a dark and dense gaseous/dusty globule, located at a distance of around 2,400 light years…
All about the Veli nebula
The Veil Nebula first formed about 8,000 years ago when an incredibly massive red giant star at least 20 times…
All about NGC 7009
NGC 7009 is a planetary nebula 4000 light years away from Earth, visible in the constellation Aquarius. It was one…
Talking about Dark Matter and Dark Energy
The visible universe—including Earth, the sun, other stars, and galaxies—is made of protons, neutrons, and electrons bundled together into atoms….