Astronomy | Astrophysics Answers

For Kepler's period law, what is the relation if T and R is respectively the period of revolution of the planet about the sun and distance of the planet from the sun?

On Jupiter a day lasts for 9.9 earth hours and the circumference at the equator is 448600 km. If the measured value of gravitational acceleration at the equator is 24.6mls² , what is the true gravitational acceleration and the centrifugal acceleration. b) A ball of mass 50g is hit due south with a speed of 70 ms-1 at latitude 60 ºN. Calculate the magnitude and direction of the coriolis force on the ball.

A comet has an aphelion distance of 6.1 × 10¹¹m and perihelion distance of 6.1 × 10¹¹m. The mass of the sun is 2.0 × 10^30 .

what is lens simulator in physics?

You are exploring in a cave and call out to one of your friends. You hear your echo. Which interaction of sound caused the echo and how did the sound waves move?

Explain why astronomers use reflecting telescopes rather than refracting
telescopes?

the mean distance of the earth from the sun is 149.6*10^6 km and the mean distance of mercury from the sun is 57.9*10^6km thm the period of earth's revolution is 1 year use keepler's law of planetary motion to determine the period of mercury's revolution

If the big bang is considered a point of infinite mass and density wouldn't that make it like a black hole. Or as I am proposing a white hole. And if that were true couldn't the observable universe be all the matter that was expelled from the opposite side or white hole if you will. Furthermore it would explain why the observable galaxies are distributed in such a homogeneous and isotropic manner. Also this may be the reason for the environment of such high energy and low entropy in the early stages of the universe. However due to the time dilation of gravity involved when dealing with black holes the possibly ongoing emissions from the white hole would go unseen by onlookers due to the loss of energy before the light or radiation waves ever reached us.

. Hydrogen has a density of 89.9 grams per cubic meter at a certain temperature and a certain pressure. Calculate the volume in cubic meters of hydrogen having a mass of 0.1 kilogram at the same temperature and pressure.

i have a degree in physics from CSM but i cannot for the life of me work out this thought problem i was proposed... ok say someone is on earth has a telescope capable of seeing a person standing 4.2 light years away on Proxima B (nearest maybe habitable planet)...is it possible to for them to wave at one another or like would one person have to wave 4.2 years before the other? (disregard that it would take a telescope with lenses 2 times the surface area of earth)