![]() As gas falls into the young protostar, it creates shocks on its surface that radiate energy. Instead, its light comes from radiation surface shocks. ![]() As a protostar, it hasn’t gathered enough mass to trigger the nuclear fusion that takes place in older stars. HD 97300 is a young, massive star that hasn’t entered the Main Sequence yet. A star named HD 97300 provides the light. IC 2631 is a reflection nebula about 500 light-years away in a giant star-forming region called the Chamaeleon Cloud Complex. The two blue stars blazing in the center of the sprawling nebula, known as HR 5999 and HR 6000, illuminate nearby gas and dust, creating the bright blue reflection nebula Bernes 149. These jets punch holes through the opaque clouds in which the star is formed, holes through which the light of the new-born stars can escape to produce what are. Stapelfeldt (Jet Propulsion Laboratory), and ESO Processing Gladys Kober (NASA/Catholic University of America) Hubble observed a small part of IC2631 in a survey looking at the disks of newly-formed stars. In 1912, American astronomer Vesto Slipher understood that light from a nearby star lights nebulae up rather than some intrinsic characteristic of the nebula itself. They even called galaxies nebulae.Īs time went on and telescopes and observations improved, they figured more things out. The word nebula means ‘cloud’ or ‘fog’ in Latin, so early astronomers called anything that appeared cloud-like a nebula. Reflection nebulae are worth monitoring regularly, as some of them can change their appearance on relatively short timescales. In the early days of astronomy, astronomers weren’t certain what they saw when they spotted a nebula.
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