A week ago released an image from the Mars Science Laboratory "Curiosity" rover that shows both the Earth and the Moon appearing as faint "evening stars" very similarly to how Venus or Mars can appear to be stars to us.
In fact, that's how the term "planet" first came into existence from the Greek word "planan", which means wanderer. Since these "wandering stars" either moved faster than or sometimes in the opposite direction of the other stars in the night sky, they received this designation before we knew of other worlds existing besides our own.
This image was taken about an hour and a half after the Martian sunset on 31st of January, 2014 (Curiosity's 529th sol on Mars) and really does a lot to provide some perspective. All of us can be seen in this picture from the surface of another planet. We were about 160 million kilometers away from the red planet when this image was captured.
#ScienceEveryday #Space #Astronomy #Mars #MSL #Curiosity #HelloWorld #Earth #Moon
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