5 scientific theories about what aliens might look like Jellyfish? Bugs? Or just like you?

We've seen them portrayed in a vast variety of Hollywood films, from the nasty, slimy suckers shown in Independence Day to the precious, teddy-bear-esque creature that charmed us in E.T. But which is closer to the truth? As our understanding of the universe grows and the outlook on our existence is in turn humbled, scientists are beginning to theorize what these extraterrestrials might look like. 

The Sombrero Galaxy is seen by the Hale

What happens in the center of this spiral galaxy? Call Sombrero Galaxy for its resemblance to the Mexican sombrero, M104 has a very striking dust lane and bright halo consisting of stars and clusters globular. 

The diffuse glow of the extended core of the galaxy is due to the brilliance of billions of old stars. 

Colorful imaged the death of a planetary nebula

The NASA has achieved through his telescope Chandra grasping the end of a star's life, namely NGC 2393, known as "Eskimo Nebula". This study allows astronomers to predict the demise of the Sun, expected within about 5,000 million years.

Planetary nebulae like this are formed when a star consumes all the hydrogen in its core, something will happen to our sun in about 5,000 million years, reports NASA. At the time this happens,