Inside the galactic disk, new stars formed. What remained on the outskirts of the original cloud were globular clusters and the halo composed of gas, dust and dark matter. Two factors from this process might account for the differences between elliptical and spiral galaxies: Angular momentum (...
The camera inside the Celestron Origin enables you to capture beautiful shots of the night sky. (Image credit: Future/Brett Tingley) There are several handles on the Origin's mount to make carrying it easier.(Image credit: Future/Brett Tingley) The Celestron Origin enabled us to view Saturn,...
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The orbits of planets in the Gliese 581 system are compared to those of our own solar system. The Gliese 581 star has about 30 percent the mass of our sun, and the outermost planet is closer to its star than we are to the sun. Gliese 581d might be able to sustain liquid water on ...