Why does the earth revolve around the sun rather than the sun revolving around the earth?
Just as the Moon orbits the Earth because of the pull of Earth’s gravity, the Earth orbits the Sun because of the pull of the Sun’s gravity. But the gravity of the Sun alters its course, causing it to travel around the Sun, in a shape very near to a circle.
Why do you think planets farther away from the sun take a longer time to make one complete revolution?
Planets that orbit closer to the Sun than Earth have shorter years than Earth. Planets that orbit farther from the Sun than Earth have longer years than Earth. This distance is called an orbital path. The closer a planet travels to the Sun, the more the Sun’s gravity can pull on the planet.
What planet takes the longest to revolve around the sun?
Neptune
Why do some planets take longer to orbit the sun?
A planet farther from the Sun not only has a longer path than a closer planet, but it also travels slower, since the Sun’s gravitational pull on it is weaker. Therefore, the larger a planet’s orbit, the longer the planet takes to complete it.
Has a spaceship ever been lost in space?
On 28 January 1986 the Challenger space shuttle blew up 73 seconds after take-off, owing to a failure on a sealant ring that allowed hot gas from the boosters used to lift the craft in the first two minutes of flight to hit the huge main external tanks containing hydrogen-oxygen fuel.
What if you took your helmet off on Mars?
The air pressure on the surface of Mars is 0.6% of Earth. As the helmet was removed all the suit air would rush out. The lungs would collapse as well if the mouth was open. If not, the lung would explode as the air inside them attempted to get out into the near vacuum.
How long would you survive on Mars without a helmet?
90 miserable seconds
Can you survive in space with just a helmet?
In earth, the atmospheric pressure balances our blood pressure. But in space, the pressure in our body will be too high and no external pressure to balance it, so you will blow like a ballon , and eventually burst . You’ll explode because of the pressure of your body and the helmet will be there without a reason.
Has anyone died in space without a suit?
At most, an astronaut without a suit would last about 15 seconds before losing conciousness from lack of oxygen. An astronaut who fell unconscious from lack of oxygen would last for a few minutes more before dying from asphyxiation or the effects of the pressure reduction.