The Dolphin Nebula is a planetary nebula in the constellation Cassiopeia, it lies an estimated distance of 5,200 light years away from Earth.

Astronomers studying celestial objects such as planets have revealed eight classifications based on mass systems. Billions of objects have been discovered in space, and astronomers make such discoveries every year. Planets are some of the most common celestial objects, and...

Stars with 0.08 to 8 timesthe mass of the Sun Will become WhiteDwarfs Stars with 8 to 20 times the Mass of the Sun Will becomeNeutron Star Stars with more than 20times the mass of the Sun Will become BlackHoles

Apollo 17 astronauts Eugene Cernan and Harrison Schmitt spent 75 hours on the moon in December 1972. They landed in the Taurus-Littrow valley of the moon Fellow traveler Ronald Evans was traveling around the moon at that time. Schmitt photographed...