Astronomy | Astrophysics Answers

a) The comet Encke has an aphelion distance of 6.1X10^11 m and perihelion distance of
5.1X10^11 m The mass of the sun is 2.0X10^30 kg. Find the speed of the comet at the
perihelion and the aphelion.
b) The planet earth is 1.5X10^11 m from the sun and orbits the sun in one year. The planet
Pluto takes 248 years to orbit the sun. How far is Pluto from the sun?

Why the Sun looks red in the morning?

The moon is 1.3 light seconds away. Estimate the eartand moon distance if c=3.0*10^8 m/s

Given:G= 6.67259×10E−11Nm2/kg2.
A 1520 kg geosynchronous satellite or-
bits a planet similar to Earth at a radius
1.93×10E5
km from the planet’s center. Its
angular speed at this radius is the same as the
rotational speed of the Earth, and so they ap-
pear stationary in the sky. That is, the period
of the satellite is 24 h
.
What is the force acting on this satellite?

how to calculate the time period of a satellite to complete one revolution around earth's surface?

Explain how Neptune really is a planet. Titius-bode law and the structure of Neptune

What would be the temperature of a spherical asteroid located between mars and jupiter, twice as far from the Sun as Earth? The asteroid has no atmosphere, and its albedo is 0.15

a body is weightless at the centree of earth why

what is the value of g on the surface of a planet whose mass as well as radius is half of the value for earth

An object falls freely from 3.2 high above the moon surface , if it takes 2s or reach the surface , find the acceleration due to the moon's gravity.
Ps.(I know it's 1.6m/s^2 but I don't know how to get it )