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In this new view of the Andromeda galaxy from ESA’s Herschel space observatory, cool lanes of forming stars are revealed in the finest detail yet. Andromeda, also known as M31, is the nearest major galaxy to our own Milky Way at a distance of 2.5 million light-years, making it an ideal natural laboratory to study star formation and galaxy evolution.
Sensitive to the far-infrared light from cool dust mixed in with gas, Herschel seeks out clouds of gas where stars are born. The new image reveals some of the very coldest dust in the galaxy – only a few tens of degrees above absolute zero – coloured red in this image.
ESA's fleet of space telescopes has captured the nearby Andromeda Galaxy, also known as M31, in different wavelengths. Most of these wavelengths are invisible to the eye and each shows a different aspect of the galaxy's nature. Visible light, as seen by optical ground-based telescopes and our eyes, reveals the various stars that shine in the Andromeda Galaxy, yet it is just one small part of the full spectrum of electromagnetic radiation.
There are many different wavelengths that are invisible to us but which are revealed by ESA's orbiting telescopes. Starting at the long wavelength end, the Planck spacecraft collects microwaves. These show up particles of incredibly cold dust, at just a few tens of degrees above absolute zero.
Slightly higher temperature dust is revealed by the shorter, infrared wavelengths observed by the Herschel space telescope. This dust traces locations in the spiral arms of the Andromeda Galaxy where new stars are being born today.
Originally posted by Chrisfishenstein
reply to post by MariaLida
These pictures look nice, but why do they look really REALLY fake to me??
Great find either way....
Originally posted by PheonixReborn
Originally posted by Chrisfishenstein
reply to post by MariaLida
These pictures look nice, but why do they look really REALLY fake to me??
Great find either way....
Because they are false-colour images to highlight differences in the temperature of the dust/gas.
Originally posted by MariaLida
Andromeda Galaxy is now 2.5 million light-years away also moving toward the Milky Way at about 250,000 miles per hour ..
This two galaxies attract each other and according to scientist and some simulations collision will be in 4 billion years ..
The Andromeda Galaxy is the nearest spiral also biggest galaxy to our Milky Way, but not the closest galaxy overall ..
NASA's Hubble Shows Milky Way is Destined for Head-On Collision
www.nasa.gov...
science.nasa.gov...edit on 30-1-2013 by MariaLida because: (no reason given)
Based on current calculations they predict a 50% chance that in a merged galaxy the solar system will be swept out three times farther from the galactic core than it is currently located.[1] They also predict a 12% chance that the Solar System will be ejected from the new galaxy some time during the collision.
Wikipedia
...by the time that the two galaxies collide, the surface of the Earth will have already become far too hot for liquid water to exist, ending all terrestrial life, which is currently estimated to occur in about 1.4 billion years due to gradually increasing luminosity of the Sun
Wikipedia