Nebulae are formed when a star such as the sun is dying and expels its gas layers outward; its entire structure is illuminated by the radiation of its central star.
The Cat's Eye Nebula is absolutely beautiful and complex, but the Helix Nebula is much larger, resembling an eye because it is also called the Sauron Nebula or the God's Eye Nebula.
Even more enormous is the Orion Nebula, which is located in the Orion constellation below the Orion Belt or the Hunter, a light year is the distance that light travels in one year, equivalent to more or less 9 and a half million kilometers, therefore the Orion Nebula would measure more or less 227 million million kilometers or 24 light years.
Did you know that the Hubble Space Telescope took a very famous photo of a very special part of a nebula, I mean the Pillars of Creation which is what we call a formation of Interstellar gas and dust in the Eagle Nebula approximately 6500 light years from Earth in the Milky Way.
Some stars, only the largest ones, die in an even more spectacular way than creating nebulae, generating supernovae, they explode in a great finale of resplendent party with a brightness equivalent to 10,000 million suns, several times greater than that of the entire galaxy. After all that revelry, sometimes what remains of a star is a neutron star, neutron stars are the remaining core after a star explodes, they are incredibly dense and some of these stars have a very particular behavior. like pulsars.
A pulsar is a neutron star that rotates very quickly and emits pulses or beams of light like a lighthouse in the middle of space. When these intermittent signals were discovered in the 1960s, they made scientists think they were looking at something alien.
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