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Hubble Space Telescope

Updated 33d ago

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Published 34d ago

Studying Andromeda helps astronomers better understand the history and evolution of galaxies like our own Milky Way.

Combined data from Panchromatic Hubble Andromeda Treasury and Panchromatic Hubble Andromeda Southern Treasury surveys mapping two-thirds of Andromeda's disk.
Measured approximately 200 million individual stars across the galaxy.
Star formation dropped from one solar mass per year 500 million years ago to one-fifth solar mass per year today.
Identified satellite galaxy M32 as a likely suspect for interacting with Andromeda's disk roughly 60 million years ago.

Published 37d ago

Understanding how gas moves and collapses to form stars helps astronomers determine how galaxies evolve over time.

NGC 4654 is located 72 million light-years away in the constellation Virgo
The galaxy exhibits an asymmetric shape with a long tail of gas from ram pressure stripping
A gravitational fly-by interaction with NGC 4639 around 500 million years ago contributed to its lopsided structure
Despite ram pressure, NGC 4654 continues forming nearly two Suns' worth of stars annually