- Apparent magnitude (m) is a measure of the brightness of a star or other astronomical object. An object’s apparent magnitude depends on its intrinsic luminosity, its distance, and any extinction of the object’s light caused by interstellar dust along the line of sight to the observer.
- 3-D Tic-Tac-Toe (Atari 2600) online game (atarionline.org)
3D Tic-Tac-Toe for the Atari 2600 is an adaptation of the classic tic-tac-toe game with an added dimension, making it a more challenging and engaging experience for players. The game was developed and published by Atari, Inc. in 1980. Instead of the traditional 3×3 grid, 3D Tic-Tac-Toe uses a 4x4x4 cube, providing a total of 64 cells for play.