Tag: nasa flying ghost nebula

[ad_1] NASA’s Astronomy Picture of the Day is a stunning picture of the star cluster and the Flying Ghost Nebula surrounded by stardust. Stars are the most widely recognized astronomical objects, and represent the most fundamental building blocks of galaxies. They are celestial objects millions of years old floating in space. The older and bigger the star, the brighter it appears. They are formed in star-forming regions called Nebulae. The makeup of a Nebula consists of gases, mainly hydrogen and helium. Gravity within a molecular cloud causes the gas and dust to collapse, forming dense cores. As the cores grow denser and hotter, they begin to fuse hydrogen atoms into helium, which releases energy in the form of light and heat. Once a core reaches a certain temperature and density, a ...