NASA's Hubble Shows Star Formation in Andromeda Galaxy Winding Down - NASA Science
Researchers found Andromeda’s star formation has fallen to one-fifth of a solar mass per year, suggesting a long, natural slowdown.
- Using NASA's Hubble Space Telescope, astronomers mapped two-thirds of Andromeda Galaxy's disk in sharp detail, measuring about 200 million individual stars to reveal a 500-million-year decline in star formation, with results published Monday in The Astrophysical Journal.
- Andromeda experienced a dramatic burst of star formation about 2 billion years ago, likely triggered by a galactic encounter, but activity has steadily declined since, dropping from one solar mass per year 500 million years ago to one-fifth that rate today.
- Researchers divided Andromeda into thousands of 300-light-year squares to map star formation history, finding most recent activity concentrated in a ring 32,000 light-years from the center, with this ring's fading driving much of the overall decline rather than material depletion.
- Near Andromeda's companion galaxy M32, star formation has nearly ceased, with activity declining around 60 million years ago, suggesting M32 likely crashed through Andromeda's disk and disrupted gas clouds, though its uncertain 3D position leaves astronomers unable to confirm timing.
- NASA's Nancy Grace Roman Space Telescope, launching as early as Sunday, Aug. 30, will capture Andromeda's entire disk with a field of view 100 times larger than Hubble, measuring hundreds of millions of stars and enabling groundbreaking discoveries about galaxy evolution.
14 Articles
14 Articles
Bad news from our neighbouring galaxy: Andromeda is running out of newborn suns
A Hubble study has found that star formation in the Andromeda Galaxy has sharply slowed over the past 500 million years. The decline may help astronomers understand how galaxies age and what lies ahead for the Milky Way.
NASA's Hubble traces hidden history of Andromeda galaxy
In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby stellar island to our Milky Way -- the magnificent Andromeda galaxy (Messier 31). It can be seen with the naked eye on a very clear autumn night as a faint cigar-shaped object roughly the apparent angular diameter of our Moon. A century ago, Edwin Hubble…
Andromeda’s star formation has been slowing down for 500 million years
Andromeda has been forming fewer stars for about 500 million years, with an especially sharp drop recently. Most of the slowdown comes from declining activity in a huge ring where much of the galaxy’s new star formation occurs. A nearby small galaxy called M32 may have influenced one quieter region, but astronomers cannot yet confirm that connection. Andromeda has not stopped making stars, but its busiest stellar nursery is losing momentum. A Hu…
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