The Universe

by lynnbradley
Last updated 4 years ago

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The Universe

Black Holes


It is theorized that a black hole was once a giant star that collapsed on itself. The black hole is the remnant of the supernova of such star. Black holes can be observed as black spots in space, or as strange light refractions. Black holes have such gravitational pull that not even light can escape from them.

A nebula is a "cloud" of matter in space. These are formed by different changes in space. Some are formed though the colision of planets, others are formed when a supernova or a gamma-buster happens. Nebulaes consist of many types of matter floating through space and can be observed thanks to the fact that such matter emmits light. Nebulaes are denser than the vaccum of space but still they are not very dense (a nebulae the size of Earth can weight a few kilos).


Planetoids are masses of matter found in space. These masses are very similar to planets but they are not. They are smaller than a normal planet and have no atmosphere. They also have little gravitational pull. So in essence planetids are small planets.

Planets are sphere-spahped masses in space. Planets must have a variety of characteristics to be considered as such. Firstly they must have an atmosphere. Planets must have a gravitational pull, Planets must have satelites and planets must be big enough. If these traits are not present then the mass is considered a planetoid.


Moons are masses of matter found rotatiing around planets. Moons are smaller than the planet they orbit and constantly rotate around them. Moons can rotate around their axis but not all do.


According to NASA black holes are not simple at all but some of their basic attributes can be calculated and explained using 10th-12th grade algebra. Apparently you can find the Accretion Dinsk temperatures of a black hole using a simple grid and solving for x and y (given some data of course). More found here:

Are Black Holes Simple?

A black hole has been discovered in the middle of the orion nebula using computer projections of star movement. This black hole might be acredited to the nebula since it brought all of that matter into a concentration. Ultimately (in about 4 billion years) the Orion nebulae along with the constellation will be completely gone.

Black Hole in The Orion Nebula



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