What is a Planet

What are the three criteria that a celestial body must meet to be considered a planet?

• It must orbit around the sun, be big enough to have gravity, and have cleared away other objects near its orbit

• It must be made of gas and dust, be spherical in shape, and have a strong gravitational force

• It must be located in our solar system, have a solid surface, and be smaller than a star

• It must have a moon, be visible from Earth, and have a stable orbit

What are exoplanets?

• Planets that orbit around stars in our solar system

• Planets that are made from a star's leftovers

• Planets that are located outside of our solar system

• Planets that have a similar size to Earth

What is the main difference between a brown dwarf and a star?

• Brown dwarfs are smaller and colder than stars

• Brown dwarfs are made of gas while stars are made of solid material

• Brown dwarfs have a strong gravitational force while stars do not

• Brown dwarfs emit light while stars do not

What is the possible origin of the smaller gassy object discovered in space?

• It formed from a small cloud of gas

• It was created around a star and got flung off into space

• It is a leftover from a supernova explosion

• It is a result of a collision between two brown dwarfs

What do some scientists argue about regarding the smaller gassy object?

• Whether it should be classified as a planet or a brown dwarf

• Whether it is older or younger than most brown dwarfs

• Whether it is redder or bluer than most brown dwarfs

• Whether it is located in our solar system or not

Do all planets, including exoplanets, need to form around stars?

• Yes, all planets must form around stars

• No, exoplanets can form independently of stars

• Only gas giants like Jupiter can form independently of stars

• Only rocky planets like Earth can form independently of stars

What is the main role of gravity in the formation of planets?

• Gravity collects material to form the sun

• Gravity causes collisions and collection of gas and dust

• Gravity determines the size and shape of a planet

• Gravity clears away other objects near a planet's orbit

What is the purpose of the definition of a planet created by scientists in 2006?

• To determine the number of planets in our solar system

• To establish criteria for classifying celestial bodies as planets

• To explain the formation of planets in other solar systems

• To compare the characteristics of planets and stars

What is the significance of the cosmic cloud called Sharpless 2-106?

• It is the birthplace of our sun and planets

• It is a cloud of gas and dust that formed around a star

• It is a cloud of gas and dust that formed a brown dwarf

• It is a cloud of gas and dust that formed an exoplanet

What is the main difference between a planet and a star?

• Planets are made of gas while stars are made of solid material

• Planets have a strong gravitational force while stars do not

• Planets emit light while stars do not

• Planets orbit around stars while stars do not