By nightfall at the start of April each year, there is a huge collection of bright stars in the western half of the sky. It includes seven stars of first magnitude or brighter, nearly half the ...

During evenings in April 2025, there are two bright planets visible. The departure of Venus has left Jupiter, in the west at ...

You can create regular polygons with optional rounded corners and alignment features not available with circle(). The file also provides teardrop2d, which is useful for 3D printable holes. Many of the ...