Website review: APOD: 2007 July 21 - Infrared Andr...
starspirit discovered this in Astronomy
•2 reviews since Jul 20, 2007
astronomy
•antwrp.gsfc.nasa.gov/apod/ap070721.html
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starspirit discovered 12 months ago- This wide, detailed Spitzer Space Telescope view features infrared light from dust (red) and old stars (blue) in Andromeda, a massive spiral galaxy a mere 2.5 million light-years away. In fact, with over twice the diameter of our own Milky Way, Andromeda is the largest nearby galaxy. Andromeda's population of bright young stars define its sweeping spiral arms in visible light images, but here the infrared view clearly follows the lumpy dust lanes heated by the young stars as they wind even closer to the galaxy's core. Constructed to explore Andromeda's infrared brightness and stellar populations, the full mosaic image is composed of about 3,000 individual frames. Two smaller companion galaxies, NGC 205 (below) and M32 (above) are also included in the combined fields. The data confirm that Andromeda (aka M31) houses around 1 trillion stars, compared to 4 hundred billion for the Milky Way.
- laodan rated 12 months ago
- Infrared Andromeda in Nasa's Astronomy Picture of the Day
Infrared Andromeda
Credit: Pauline Barmby ( Harvard-Smithsonian CfA) et al., JPL, Caltech, NASA Explanation: This wide, detailed S pitzer Space Telescope view features infrared light from dust (red) and old stars (blue) in Andromeda, a massive spiral galaxy a mere 2.5 million light-years away. In fact, with over twice the diameter of our own Milky Way, Andromeda is the largest nearby galaxy. Andromeda's population of bright young stars define its sweeping spiral arms in visible light images, but here the infrared view clearly follows the lumpy dust lanes heated by the young stars as they wind even closer to the galaxy's core. Constructed to explore Andromeda's infrared brightness and stellar populations, the full mosaic image is composed of about 3,000 individual frames. The data confirm that Andromeda (aka M31) houses around 1 trillion stars, compared to 4 hundred billion for the Milky Way. Infrared Andromeda Imagine, just imagine what the following really means. Our Milky Way contains 400 billion stars and our solar system is one of them. And we are a grain of dust on the skin of Gaia and we look at an image of our Milky Way's neighbor galaxy Andromeda. What are we?
- Infrared Andromeda in Nasa's Astronomy Picture of the Day
