Astronomy for Beginners
Here’s where you’ll find observing guides, how-to articles and great astronomy hints and tips. Don’t forget to also check out our comprehensive astronomy dictionary.
A type of optical filter that’s used for observing the Sun. It blocks all wavelengths of light except for a very narrow portion at 656.3nm.
The point in the orbit of an object that takes it closest to the Sun.
An emission of charged particles moving at supersonic velocities away from the surface of the Sun.