What exactly is a nebula, and which different types of nebulae can we see in space?
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NGC 7331 and Companions, by Paddy Gilliland
Messier 52 and NGC7635 Bubble Nebula, by Peter Feltóti
Orion the Hunter Mosaic, by Johann Nishant
On Top, by Alex Conu
Dark Nebulae and Dust in Taurus, by Johann Nishant
M33, by Paddy Gilliland
NGC 7331 and Stephan's Quintet, by Peter Feltóti
The Squid and the Flying Bat, by Paul C. Swift
By Pierre Markuse Why do objects in space sometimes have different colors in different images? You have probably seen many stunning and spectacular...