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Explanation: How do stars form? Images of the star forming region W5 like those in the infrared by NASA's Wide Field Infrared Survey Explorer (WISE, later NEOWISE) satellite provide clear clues with indications that massive stars near the center of empty cavities are older than stars near the edges. A likely reason for this is that the older stars in the center are actually triggering the formation of the younger edge stars. The triggered star formation occurs when hot outflowing gas compresses cooler gas into knots dense enough to gravitationally contract into stars. In the featured scientifically colored infrared image, spectacular pillars left slowly evaporating from the hot outflowing gas provide further visual clues. W5 is also known as Westerhout 5 (W5) and IC 1848. Together with IC 1805, the nebulas form a complex region of star formation popularly dubbed the Heart and Soul Nebulas. The featured image highlights a part of W5 spanning about 2,000 light years that is rich in star forming pillars. W5 lies about 6,500 light years away toward the constellation of Cassiopeia.
APOD Turns 30!:
Free public lecture in Cork, Ireland tomorrow (Tuesday) at 7 pm
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: W5 - star formation
Publications with words: W5 - star formation
See also:
- APOD: 2025 April 28 B Gum 37 and the Southern Tadpoles
- APOD: 2025 March 26 B Star Formation in the Pacman Nebula
- APOD: 2024 October 22 B M16: Pillars of Star Creation
- Star Factory Messier 17
- APOD: 2024 August 19 B IC 5146: The Cocoon Nebula
- APOD: 2024 July 16 B Cometary Globules
- Protostellar Outflows in Serpens