Physics – National Radio Astronomy Observatory

Sun Distance Required to Match Apparent Size at Perihelion

I believe that you can use the principle of similar triangles to solve this problem. Let D_sun be the…

A Tatooine-like planet, or a planet that orbits a binary star system, would very likely orbit at a relatively…

To varying degrees radio astronomical measurements are affected by the Earth’s atmosphere, including changes in water vapor content. These…

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”. …

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