Astronomical Poi'sPlaces to go, and Things to See Large Version of above image IC 2118 - Witch Head Nebula IC 2118 (also known as Witch Head Nebula due to its shape) is an extremely faint reflection nebula believed to be an ancient supernova remnant or gas cloud illuminated by nearby supergiant star Rigel in
What Is Dark Energy?What Is Dark Energy? The leading explanation of dark energy suggests that it is a type of pent-up energy inherent in the fabric of space-time. Dark energy is an enigmatic phenomenon that acts in opposition to gravity and is responsible for accelerating the expansion of the universe. Though dark
