Located in the constellation Aquila (the Eagle) Altair is 16.8 light-years from Earth, making it one of the closest stars visible to the naked eye. It's also the 12th brightest star in the night ...
The Owl Nebula is a planetary nebula located about 2,030 light-years away in the constellation Ursa Major. It is estimated to be around 8,000 years old. The Horsehead Nebula, located in the ...