Why don't those stars move?
Stars in the sky will typically appear to rise and
set as the Earth turns.
Those far to the north or south will appear to
circle the pole.
If you look closely at the
above time-lapse movie,
however, there are points of light that appear
These objects are not stars but
human-launched robotic spacecraft that remain fixed high above the
Called geostationary satellites, they don't fall down because they do orbit the Earth -- they just orbit at exactly the same speed that the
The orbital distance where this is possible is much farther than the
International Space Station but much closer than the Moon.
The video was taken from one of the
revolving restaurants in the world located on the
in the Swiss
In the foreground is a mountain known as the
An even closer inspection will show that the
geostationary satellites flash with
glints of reflected sunlight.
The satellites also all appear on a single line --
actually the projection of the Earth's equator onto the sky.