Summary
It is making fewer new stars than before.
Scientists saw this change happen over many millions of years.
Key Points
4 points1
Andromeda is a galaxy near our Milky Way.
2
It is about middle age for a galaxy.
3
Its star‑making rate is dropping.
4
The change happened over the last 40 million years.
New Words to Learn
5 wordsAndromeda
a big collection of stars far away
galaxy
a huge group of stars, gas, and dust
middle age
the time between being young and very old
star formation
the process of new stars being born
million
the number 1,000,000
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