It is rare for two galaxies to lie exactly along the same line-of-sight, so that the one closer to…
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How to Convert Between Flux Density Units
You can find a description of the conversion you are looking for on the Spitzer Telescope Handbook page on…

Astronomical Coordinate Systems Questions
To answer your first question, keep in mind that the geocentric ecliptic coordinate system is, as the name implies,…

When Does a Neutron Star or Black Hole Form After a Supernova?
A neutron star that is left-over after a supernova is actually a remnant of the massive star which went…

Is Radio Astronomy the First to Measure the Universe Through Invisible Light?
In fact, most of the wavelengths of light that things like stars, planets, and galaxies radiate at are at…

How Much Dark Matter Does the Milky Way Contain?
You can read about how the Milky Way galaxy’s rotation curve is measured and how this rotation curve indicates…