2007-10-10 02:49:12 · 4 answers · asked by dandamanx2 2 in Science & Mathematics ➔ Astronomy & Space
Because the Earth is revolving in its orbit around the Sun, bringing different constellations into view as it moves through the year. For example, right now the Sun is in Virgo, so when we look in the opposite direction (at midnight) we see Pisces. Six months from now, the Sun will be in Pisces, and when we look outward at midnight, Virgo will be in the sky.
2007-10-10 03:01:18 · answer #1 · answered by GeoffG 7 · 3⤊ 0⤋
Because of the 23° tilt to the Earths axis. As the planet orbits the Sun the change in Earths relation to the plane of the solar system means that the visible constellations appear to slowly move up and down as the seasons progress.
The most northerly and the most southerly disappear from view for months at a time.
2007-10-10 02:56:48 · answer #2 · answered by Anonymous · 1⤊ 3⤋
Imagine it like being on a merry-go-round, or carousel. You see different things as it goes around.
2007-10-10 03:06:39 · answer #3 · answered by cyswxman 7 · 1⤊ 0⤋
Becasue nothing is fixed in the Galaxy or other Galaxies. Our Solar System is in a constant motion and stays in a relative but predictable orbit. It is relative to other heavenly bodies.
2007-10-10 02:54:32 · answer #4 · answered by Will 4 · 1⤊ 4⤋