• Science & Technology

  Stars

  Posted by Amelia Andaloy on September 17, 2024 at 3:29 pm

  How long does it take for light to reach us from the stars?

  Amrapali Niungare replied 6 months, 4 weeks ago 3 Members · 2 Replies

  • Science & Technology
• 2 Replies

• 

  Glenda

  Member

  September 18, 2024 at 3:34 pm

  How long does it take for light to reach us from the stars?

• 

  Amrapali Niungare

  Member

  September 19, 2024 at 11:31 am

  The time it takes for light to reach us from stars varies greatly depending on their distance from Earth. Here are a few examples:

  Proxima Centauri, the closest star, is about 4.24 light-years away, so light from it takes about 4.24 years to reach us.

  Sirius, the brightest star in our night sky, is about 8.6 light-years away, meaning its light takes about 8.6 years to arrive.

  For stars in the Andromeda Galaxy, which is around 2.5 million light-years away, the light we see today left those stars 2.5 million years ago.

  In general, because space is so vast, many stars we observe are millions or even billions of light-years away, so their light can take a very long time to reach us!

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