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Dwarf Planets
- Unlike planets, they can share their orbit with other dwarf planets.
- Five dwarf planets of the solar system are Pluto, Ceres, Eris, Makemake and Haumea.
![shutterstock_1026668485.jpg](https://resources.cdn.yaclass.in/d3e351d1-5f3c-4a49-a026-0e2d9cd251d1/shutterstock1026668485w400.jpg)
The Moon - Earth’s Satellite
- Celestial objects that revolve around the planets
- The moon is the Earth’s only satellite.
- Duration of revolution: \(27\) days and \(8\)hours
![shutterstock_1363922060.jpg](https://resources.cdn.yaclass.in/baf6ac16-88a6-450c-93db-d7a948f468fc/shutterstock1363922060w400.jpg)
Important!
Duration of rotation and revolution is the same.
- No atmosphere
- The surface of the moon is characterized by craters.
- The distance between the moon and the Earth: \(3,84,400\) km.
- Size of the moon: One-quarter of the Earth.
![shutterstock_1137090158.jpg](https://resources.cdn.yaclass.in/5fdc4024-d47e-4434-a1d1-95edb7490dc5/shutterstock1137090158w400.jpg)
Asteroids
- Small solid objects that move around the Sun.
- Found between Mars and Jupiter.
- They are too small to be called planets.
- They are also known as Planetoids or Minor Planets.
![shutterstock_1255163161.jpg](https://resources.cdn.yaclass.in/d5ef347b-b663-45ac-990b-a1eed9057b25/shutterstock1255163161w400.jpg)
Hitting of Asteroids is considered as one of the reason for extinction of dinosaurs.
Comets
- Celestial object made up of a head and a tail.
- The head of a comet consists of solid particles held together by ice, and the tail is made of gases.
- Halley’s Comet is the most famous comet which comes close to the Earth in every (\(76\)) years.
![shutterstock_204172201.jpg](https://resources.cdn.yaclass.in/c38257de-5ff8-4317-a7f7-ecd06a7613db/shutterstock204172201w400.jpg)
- It last appeared in \(1986\)
- Expected to appear in \(2061\)
Meteors and Meteorites
- A meteor is stone-like or metallic body
- Most of them burn while entering Earth’s atmosphere.
- Also known as Shooting Stars
![shutterstock_1246646749.jpg](https://resources.cdn.yaclass.in/177148b7-c468-4f74-a211-9e106a367883/shutterstock1246646749w400.jpg)
- Meteors which strike the Earth’s surface are called Meteorites.
![shutterstock_1090585073.jpg](https://resources.cdn.yaclass.in/ba5eb90a-8ce5-4349-9bc5-a896a6a07d8a/shutterstock1090585073w400.jpg)