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Astronomy Basics: Galaxies, Nebulae, and the Big Bang

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Astronomy Basics: Galaxies, Nebulae, and the Big Bang

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Questions and Answers

What is the primary function of a star in a planetary system?

To provide energy to all the system's bodies (correct)
To provide gravity to hold the planets in orbit
To absorb excess energy from the planets
To create new planets and solar systems

What is the term for a group of objects that are locked in orbit around a central star?

Galaxy
Solar system
Nebula
Planetary system (correct)

What is the characteristic shape of a spiral galaxy?

Elliptical
Long arms of stars and other material extending out from the center (correct)
Irregular
Circular

What is the primary composition of a nebula?

Cloud of hydrogen gas, helium gas, dust, and plasma (A) Signup and view all the answers

What is a characteristic of a planet in our solar system?

It has cleared its orbit of all other material (B) Signup and view all the answers

What is the pattern of distance between planets in our solar system?

The distance between the inner planets is smaller than the distance between the outer planets (C) Signup and view all the answers

What is the primary characteristic that distinguishes dwarf planets from planets?

They have not cleared their orbits of all other material (D) Signup and view all the answers

Where are most asteroids in our solar system found?

Between Mars and Jupiter (A) Signup and view all the answers

What happens to meteoroids when they enter a planet's atmosphere?

They become meteors (D) Signup and view all the answers

What is the name of the theory that describes the shortest path to travel from one planet to another?

Hohmann's Theory (B) Signup and view all the answers

How often is it possible to travel from Earth to Mars with the shortest distance?

Once every two years (C) Signup and view all the answers

What is the characteristic that distinguishes comets from asteroids?

They have a thin atmosphere called a coma (B) Signup and view all the answers