Astronomy | Astrophysics Answers

Calculate the ratio of the surface temperatures of the stars A and B from the
following data:
Star Absolute magnitude Radius (RQ)
A 2 62
B 6 4

The distance of planet Jupiter from the Sun is 5 AU. Express this distance in light
year and parsec.

Is it possible for a tidally locked planet to have a moon?

If fire needs oxygen then how sun is burning in space? As there is no oxygen in space.

When a vehicle is passing through the atmosphere, at some point it may decelerate at a rate of 39.2m/s^2 (away from the center of Earth) while Earth's gravitational pull remains at -9.80m/s^2.
a)In such a situation, what is the apparent weight in gs of an astronaut inside the vehicle?
b)In this situation, is the astronaut in a microgravity situation?

how many number of sun family in a universe?

is the sun has a surface ?

is any substance that is not a solid,not a liquid,not a gass?

where is the center of earth?

how much the mass of sun?