sun moon
The Space Needle in Seattle typically receives an average of 2,800 visitors per day.
The Hubble telescope uses a computer system and lenses while orbiting our earth. The computer system transmits data from the lenses and send it back to the computers on earth, we look at the data and interpret it, and from the pictures you get from space we are able to look at the frame time of later movements of fragments, objects and rocks in space. From the pictures that were taken day by day, the scientists see a dark area on the picture, and in that area the objects move around the dark spot, and puzzling as it may be, they finally came to a conclusion that this was the black hole that was mathematically theorized.
Imagine three adult men - each with a form-fitted chair to sit or recline in - sitting side by side in a room space about the size of a child's bedroom. That was the total space they had, or could move around in, during the 7-8 day Apollo flights.
Different layers of the atmosphere are at different temperatures and create distortions when viewing objects from space, sort of like what a mirage does on a road on a hot day.
The gravitational force between objects increases as the distance between objects decreases.
False. The sun appears to move across the sky each day due to the Earth's rotation on its axis, not its revolution around the sun.
Time in space, particularly in low Earth orbit, experiences a phenomenon known as time dilation due to the effects of gravity and velocity. This causes time to move slightly slower in space compared to on Earth. The difference is very small but becomes more pronounced as objects approach the speed of light.
east 2 west
east 2 west
energy
All of those objects were discovered by telescope, so it's safe to say that telescopes were used from day one for each.
We do not HAVE to use satellites. You can look up and see the sun or stars - depending on the time of day - using only your eyes.