.
Astronomy Practice Sheet
Introduction
Welcome to the Astronomy practice sheet. Astronomy is the study of the stars, planets, and other objects in space. In this practice sheet, you will learn the basics of Astronomy and practice some of the concepts you learn.
Basics of Astronomy
- What is Astronomy?
Astronomy is the scientific study of celestial objects, such as stars, planets, comets, nebulae, and galaxies, and phenomena that originate outside of Earth's atmosphere.
- What are the different types of objects studied in Astronomy?
The different types of objects studied in Astronomy include stars, planets, comets, asteroids, nebulae, and galaxies.
- What is a star?
A star is a celestial body that is composed of gas and emits light and heat. Stars range in size and temperature, and they are the most abundant objects in the universe.
- What is a planet?
A planet is a celestial body that orbits a star and is large enough to be rounded by its own gravity. Planets can have moons, rings, and atmospheres.
- What is a comet?
A comet is a celestial object composed of ice and dust that orbits the Sun. Comets have a tail that is formed when the comet is heated by the Sun.
- What is a nebula?
A nebula is a large cloud of gas and dust in space. Nebulae are often the birthplace of stars, and they can be seen in the night sky.
- What is a galaxy?
A galaxy is a huge collection of stars, gas, and dust that is held together by gravity. Galaxies come in a variety of shapes and sizes, and they can contain millions or even billions of stars.
Practice Questions
- What is the name of the closest star to Earth?
Answer: The closest star to Earth is the Sun.
- How many planets are in our Solar System?
Answer: There are eight planets in our Solar System: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
- What is the name of the largest planet in our Solar System?
Answer: The largest planet in our Solar System is Jupiter.
- What is the name of the comet that is visible from Earth every 76 years?
Answer: The comet that is visible from Earth every 76 years is called Halley's Comet.
- What is the name of the closest galaxy to our own Milky Way?
Answer: The closest galaxy to our own Milky Way is the Andromeda Galaxy.
- What is the name of the brightest star in the night sky?
Answer: The brightest star in the night sky is Sirius, also known as the Dog Star.
- What is the name of the largest nebula in the night sky?
Answer: The largest nebula in the night sky is the Orion Nebula.
