- Messier 68 (Wikipedia)
Messier 68 (also known as M68 or NGC 4590) is a globular cluster found in the east south-east of Hydra, away from its precisely equatorial part. It was discovered by Charles Messier in 1780. William Herschel described it as “a beautiful cluster of stars, extremely rich, and so compressed that most of the stars are blended together”. His son John noted that it was “all clearly resolved into stars of 12th magnitude, very loose and ragged at the borders”.
- Mechanics (Wikipedia)
Mechanics (from Ancient Greek: μηχανική, mēkhanikḗ, lit. “of machines”) is the area of mathematics and physics concerned with the relationships between force, matter, and motion among physical objects. Forces applied to objects result in displacements or changes of an object’s position relative to its environment.