physics – National Radio Astronomy Observatory

Mars Retrograde Motion

I believe what you are seeing is the apparent “retrograde”, or backwards, motion of Mars as the Earth overtakes…

“OII” is singly-ionized oxygen, in what is called spectroscopic notation.

I have not been able to find any evidence of observed auroral phenomena associated with Jupiter’s “Great Blue Spot”. …

Planets that are in orbits that are closer to the Sun than Earth (Venus and Mercury) generally follow the…

At any given time it is the Earth’s equator that receives the most sunlight throughout the year. Hopefully I…

As you noted, the overall answer to this question was provided in our previous post, which noted that we…

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