ASP Solar System Astronomy

Question 1

Which planet in our solar system has the most known moons as of recent counts?

Accepted Answer

Saturn

Answer

Saturn currently holds the record for the most confirmed moons, surpassing Jupiter with over 140 discovered moons.

Question 2

What is the approximate distance from Earth to the Sun, known as one Astronomical Unit (AU)?

Accepted Answer

Both A and B are correct

Answer

One AU equals approximately 93 million miles or 150 million kilometers, and both values are accepted representations of this distance.

Question 3

Which region of the solar system is considered the source of long-period comets?

Accepted Answer

Oort Cloud

Answer

The Oort Cloud, a distant spherical shell of icy bodies surrounding the solar system, is the source of long-period comets with orbital periods exceeding 200 years.

Question 4

What causes the seasons on Earth?

Accepted Answer

Earth's axial tilt of 23.5°

Answer

Earth's axial tilt of approximately 23.5° causes different hemispheres to receive varying amounts of solar radiation throughout the year, creating seasons.

Question 5

What is the primary composition of Jupiter's atmosphere?

Accepted Answer

Hydrogen and helium

Answer

Jupiter's atmosphere is primarily composed of about 89% hydrogen and 10% helium by number of molecules, similar to the Sun's composition.

ASP - Astronomical Society of the Pacific Exam Practice Test

ASP - Astronomical Society of the Pacific Exam Practice Test

ASP Solar System Astronomy