Also known as NGC 5128.Centaurus A. is the closest active galaxy to Earth.It was first discovered in 1826 by the Scottish astronomer James Dunlop. It is the fifth brightest sky in the sky and one of the closest radio galaxies...
Stephenson 2-18 (St2-18) is a red supergiant star located in the scutum constellation. Also known as Stephenson 2-DFK 1 and RSGC2-18. Stephenson 2-18 is currently the largest known star in the universe. This is also the most luminous red supergiants...
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