A planet is located at < - 3×1010, 8×1010, - 5×1010 > m. A star is located at < 8×1010, - 5×1010, 5×1010 > m.

Brayden knows the distance from Earth to Pluto is 5.9×1095.9×109 kilometers.  He has learned that there is a new space shuttle under development that can travel at a speed of 28,000 kilometers per hour.  Brayden is trying to determine how long in days it would take a space crew on this new shuttle to reach Pluto.  His work is below.

What would be the distance to the nearest star, Alpha Centauri (4.4 light-years away). (Hint: Find the distance to Alpha Centauri in units of AU.) Express your answer to two significant figures and include the appropriate units.

Our sun was born approximately 4.6 billion years ago. How many journeys around the centre of our galaxy has the sun made? 21 25 35 50

A planet that has a mass 2.03 times that of the Earth is orbiting a star that has the a mass 3.86 times that of our Sun. The planet orbits at an average distance of 0.75 AU. How does the gravitational force between this planet and its star compare to the force between the Sun and the Earth?

During most of a trip from Earth to Venus, we'll measure the velocity of a spacecraft with respect to     the center of the Milky Way galaxy     the center of the Sun     the center of the Earth     the center of Venus

(4) A spherical planet has a radius of 2,000 km and a mass of 1025 kg. Calculate its density(mass/volume) in kilograms per cubic meter.

What would the angle between the Sun and the Earth be if the solar system were viewed from a distance of 1 pc?

A star with half the mass of the Sun has a planet that orbits with an average distance of 0.5 AU from the star.  The planet would have an orbital period of:

An astronomical unit (AU) is defined as the average distance between     the solar system and Alpha Centauri     the Earth and the Moon     the Milky Way Galaxy and the Andromeda Galaxy     the Earth and the Sun