Astronomy | Astrophysics Answers

Approximately how many times larger is the distance to the nearest star than the distance to Pluto

Is the Gravitational Constant (Big G) the same all over the universe?

An important wavelength of radiation used in radio astronomy is 21.1 cm. (This wavelength of radiation is emitted by excited neutral hydrogen atoms.) This radiation travels at the speed of light, 3.00×108 m/s. Compute the frequency of this radio wave.

Explain why the following statement is wrong:
‘The moon does not fall down as it moves around the earth because the centrifugal
force balances the force of gravitation and hence there is no net force to make it fall.’
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what does light cause when it passes through a prism?

Why are satellites of the earth found above the earth's atmosphere?

For Science, I have to draw a picture of the sun earth and the stars to explain why an autumnal constellation is best viewed in its season. So why is an autumnal constellation best viewed in autumn?

what happens if a hole made through the centre of the earth and a body falls down

A satellite is in an elliptical orbit at altitudes ranging from 240 to 870 . At its highest point, it's moving at 7.33. How fast is it moving at the lowest point?

Two meteoroids are 2.4×105 from Earth's center and moving at 2.1 . One is headed straight for Earth, while the other is on a path that will come within 8500 of Earth's center.Find the speed of the second meteoroid at its closest approach to Earth.