Latest Apsis Stories
Just how far is it from Earth to Mars? The answer may be a bit more complicated than you expect.
The biggest and brightest full moon of the year will occur this weekend. An estimated 16% brighter than normal, this spectacular ‘Supermoon’ will be visible in the night sky on Saturday (May 5) at 11:35 p.m. EDT.
On March 19th, a full Moon of rare size and beauty will rise in the east at sunset.
Starting this week, spacecraft controllers have been executing a series of maneuvers to gradually bring Venus Express closer to its host planet.
Orbit -- An orbit is the path that an object makes around another object under the influence of some force. The classical example is that of the solar system, where the Earth, other planets, asteroids, comets, and smaller pieces of rubble are in orbit around the Sun; and moons are in orbit around planets. These days, many artificial satellites are in orbit around the Earth. Understanding orbits There are a few common ways of understanding orbits. -- As the object moves, it...