Today we are announcing the new contests for June 2023! If you are new to our monthly contests, you should read the general rules first.

The 3 types of twilight; Civil, Nautical and Astronomical

When we need to scale dark calibration frames in processing astro image data.

The radius valley is a well-known dip in the number of exoplanets with sizes between ‘super-Earth’ and ‘sub-Neptune’ types.

Short primer on dithering

Explainer on Bit Depth

Telescope Imaging Filters Explained

A young hot star by the name of Fomalhaut has been observed to have a more complex ring structure of debris than originally thought.

Today is podium day!

Telescope Focal Ratio

Since the 1980s, scientists have been aware that Saturn’s innermost icy rings are gradually eroding onto the gas giant’s atmosphere.

Today we are announcing the new contests for May 2023! If you are new to our monthly contests, you should read the general rules first.