Physics, 16.01.2021 03:40, pmartand

When we look at these objects in the night sky, which are we seeing as they were farthest back in time? The Pleiades (~440 light years distant)

Castor (~50 light years distant)

The Orion Nebula (~1340 light years distant)

Sirius (~9 light years distant)

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When we look at these objects in the night sky, which are we seeing as they were farthest back in ti...