Infographic of the Day: How Galaxies are Classified by Typeastronomer edwin hubble
Astronomer Edwin Hubble, after whom the space telescope is named, classified galaxies according to shape. The Hubble scale chart takes a wishbone, or tuning fork shape. Armless, elliptical galaxies are on the left. Spirals are divided into those with a central bar and those without one. Loose...
Galaxies are large systems of stars, gas, dust and dark matter that orbits a center and is bound by gravity. Learn about the characteristics of galaxies.
However, there are two places between the Earth and moon called Lagrange Points L-4 and L-5. At these points, the Earth's gravity and the moon's gravity are counter-balanced so that an object placed there would not be pulled toward the Earth or moon. The orbit would be stable and ...
Astronomers haveestimatedthe number of stars in the Milky Way galaxy as one hundred billion (this is a low estimate by the way). The Milky Way is an average galaxy. Astronomers estimate that there are one hundred billion galaxies in the known universe (another low estimate). The math to fi...
When you are ready to take your passion further, I’ll explain how to use a camera and telescope to take deep-sky images of galaxies and nebulae. This includes sharing my knowledge of camera control software,autoguiding, image processing, and much more. As you learn about new hardware optio...
For smaller telescopes (100mm and under), most deep-sky objects such as galaxies and nebulae will be dim and difficult to find. However, there are a few practical choices that I suggest you try in this range. The Andromeda Galaxy
If you and your classmates all took a 25-question quiz asking you to write a different letter of the alphabet in each space, chances are excellent that almost everyone would get 25/25 right. On the other hand, if you were asked to name 25 galaxies besides the Milky Way, the class aver...
Galaxies are enormous aggregates of gravitationally bound stars. They are classified according to their shape, but in general they resemble flat disks, with or without a central bulge and/or spiral arms. Astronomers believe that our galaxy, seen from outside, would look more or less like the ...
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