Chapter 1

Which one of the following statements best describes the Sun?

In the organization diagram below in which area the term: Polaris would appropriate fit?

Which of the following sequences objects is in the correct order of increasing distance?

The nearest star to our solar system is alpha Centauri at 4.0 ´ 1016 m (4.3 ly away). The diameter of the sun is 1.4´ 109 m. How many suns would it take to line up adjacent to each other in order to reach alpha Centauri?

There approximately 100 billion stars in our galaxy. If there 100 billion observable galaxies in our universe, what is a reasonable estimate for the total number ion the universe?

The distance to a super cluster galaxy might be

Approximately 100 Earths would fit inside Jupiter. This Jupiter’s radius must be …………….times larger that Earth’s radius.

A spherical particle in the ring of Saturn has radius of about 1m. The surface area of the particle in the area of radiation flow is

A spherical particle in the ring of Saturn has radius of about 1m. The cross sectional area of the particle in the area of radiation flow is:

If the landing lights in Denver airport were switched on, then in one second these photons travel to:

Sirius the brightest star in the sky is about 9 ly away. If the speed of light became half of its present value, how far would Sirius be?

The Andromeda galaxy is about 2,000,000 ly away. Therefore light started its travel

In the diagram, what is the diameter of Mercury?

What is 5.7×107 the same as?

If the distance from the Sun to the Earth is represented by roughly 15 metres, then what would the distance from the Earth to the Moon on the same scale be?

Approximately how many times larger than the diameter of a typical planet (the Earth) is the diameter of a typical star (the Sun)?

What does the Solar System contain?

What is the approximate diameter of the Earth?

Which of the following is no longer considered a major planet?