As many as the stars.
The temperature doesn't actually vary much, day or night. The temperatures are around 460 to 480 degrees Celsius everywhere, all the time.
there is quite a lot of light in the Sahara desert and at night it is quite a bit of light.
It magnifies the available (ambient) light. Night-vision technology amplifies available light by as much as 40,000 times.
Bees navigate by sensing the polarization of light. Since there isn't much polarized light at night, she was probably lost.
The speed of light is not infinite. Even the light from our own Sun takes over 8 minutes to reach us and it is so much closer than any star. The light from Alpha Centauri takes over 4 years to reach us so when you look at it tonight you are seeing what it was really like in 2004. If it exploded last year we wouldn't know about it until 2012/13 when the light reached us. And Alpha Centauri is one of the three nearest stars!
The sun provides both day and night light. Daylight directly from the sun and night light when it is reflected back from the moon.
No more than $20
It is actually absolute magnitude, opposed to apparent magnitude which is how much light stars appear to give off.
Depending on what information you're actually looking for....there are 16 oz. in a U.S. pound.
Technically no, but valid guess. At night, the sun's rays reflect off the moon and back on to Earth. The reason the light is so much dimmer is because a lot of light energy is lost in the process.
By looking at how bright the light is, sailors can work out how far away they are or how close they are because, the brighter the light the closer they are. the further away they are, the light will be much dimmer. Hope this helps, I was stuck on it too but then i figured this out. :D Love from xxSxx
yes, pretty much - except at night :)