When was it confirmed that Mercury has a 3:2 spin-orbit resonance and by whom (research group/radio observations… )? The first suggestion was made by Giuseppe Colombo in 1965. Its proximity to the…

Recently some new moons of Jupiter were discovered. However the moons are pretty damn small indeed - only a few kilometers wide. That makes me wonder if they should even be called moons in the first

This is a very basic question but I am little confuse the difference between luminosity distance and distance. Can anyone tell me that what is the difference between luminosity distance and distance?

I would like to know when the moon is directly overhead 0° S, 166° E. Are there any websites that will show me any of those dates?

If black holes swallow stuff, will a big black hole eventually swallow the universe? The universe will eventually go dark, because there will not be enough matter to make stars, and all that will b…

Wolf 1061 (only 13.8 ly away) was recently found to have three rocky planets one of which is in the habitable zone. It was stated on the english wikipedia site that it has a very stable light curve…