A type of reflecting telescope whose eyepiece is located behind the primary mirror. The primary mirror is cast with a hole in the center. When light enters the telescope, it reflects from the primary mirror to the secondary mirror. The secondary mirror reflects the light back through the hole in the primary mirror to the eyepiece.
Chunk of frozen gasses, ice, and rocky debris that orbits the Sun. As the nucleus begins to disintegrate, it also produces a dust tail in its orbital path and a gas or ion tail pointing away from the Sun.
|Computer Hand Control||
מחשב הטלסקופ – שלט המאפשר שליטה ובחירת מטרות הצפייה
A grouping of stars that make an imaginary characters in the sky. There are 88 constellations.