We find out that earth is not the center of the universe and from the 17th century that the Sun is not the center of our galaxy (Milky Way). Today we know that our galaxy is part of a growing universe with billions of galaxies, containing billions of Suns (Stars).
The images after the jump explain our place in the universe with a very easy way.
How big are Galaxies? Using images made from NASA and ESA observation missions Arecibo astrophysicist Rhys Taylor, illustrates the relative sizes of 25 selected galaxies, including our Milky Way at the center for comparison. Have a look at the detailed chart after the jump…
Hubble space telescope spots a ‘space invader’ that seems to show an alien staring at Earth. Actually the strange object is a mirage created by the gravitational field of a foreground cluster of galaxies. Image © NASA/ESA. Acknowledgement: N. Rose
This new gigantic 9-Billion-Pixel photo of Milky Way’s center, from the VISTA infrared survey telescope at ESO’s Paranal Observatory, contains more than 84 million stars. Image credit: ESO/VVV Consortium. Acknowledgement: Ignacio Toledo, Martin Kornmesser
Astronomers using NASA‘s Swift satellite recently detected a new black hole, by a rise in high-energy X-rays from a source toward the center of our Milky Way galaxy. The outburst, produced by a rare X-ray nova, came from a previously unknown stellar-mass black hole. Image credit: NASA’s Goddard Space Flight Center
A collision of two galaxies has left a merged star system with an unusual appearance as well as bizarre internal motions. Messier 64 (M64) has a spectacular dark band of absorbing dust in front of the galaxy‘s bright nucleus, giving rise to its nicknames of the “Black Eye” or “Evil Eye” galaxy. Image credit: NASA and The Hubble Heritage Team (AURA/STScI)
This new image of the centre of the distinctive galaxy Centaurus A, made with the Atacama Large Millimeter/submillimeter Array (ALMA), shows how the new observatory allows astronomers to see through the opaque dust lanes that obscure the galaxy’s centre, with unprecedented quality. Image credit: ALMA (ESO/NAOJ/NRAO); ESO/Y. Beletsky