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Mass, size, temperature, luminosity, chemical composition, the initial abundance of the molecular cloud, distance, brightness, age, and evolutionary cycle can all be used to characterize a star. A star's brightness...
Asked on 11/13/2021
2 answerMany or all comets visible to the naked eye are referred to as Great Comets of their year(s). Might NEOWISE too be called like this? Why or why not? Is...
Asked on 11/08/2021
2 answerToday the NY Times published an article that explained how to see NEOWISE at night. The article explains it like this:To catch NEOWISE yourself, look up at...
Asked on 11/08/2021
5 answerAt first it seems like the answer is obvious, $100$% or more, that's what a total solar eclipse is after all. But after seeing satellite images of the ...
Asked on 11/05/2021 by user267545
1 answerI know Neil Armstrong placed a mirror on the Moon and people shoot lasers there which get reflected, by this, measuring the time the light is needing, they can conclude...
Asked on 09/28/2021
2 answerThere are of course many, many sources that quote Kepler's laws of planetary motion. This is preventing me from finding out what I really want to know: which is -...
Asked on 09/28/2021 by ProfRob
1 answerWe have a charged black hole which is negatively charged. For this simple case the black hole is not rotating. If a negatively charged particle approaches the singularity the electromagnetic...
Asked on 09/28/2021 by Helena Wells
0 answerI'm not an astronomer, please excuse my non-formal language. Since we are located in one of the arms of the Milky way, the center of the galaxy should be in...
Asked on 09/28/2021 by riorio
2 answerOr in other words: which moons do have ionospheres but not surface-bound ones? The space beneath an ionosphere is called a neutrosphere. I only know of Titan. I know that...
Asked on 09/28/2021
0 answerUsually, especially for an extragalactic object, its redshift is determined by optical spectroscopic redshift. But the angular resolution of early radio observations is poor and an optical counterpart needs time...
Asked on 09/28/2021 by questionhang
1 answerGet help from others!
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