Science: Carlos's Notes on Celestial Objects PDF

**What do galaxies consist of? What is a nebulae?** The galaxies consist of million of stars and nubelae. The nubelae is a cloud of gas and dust. 2. **Name the shapes of galaxies. What is the name of our Galaxy?** The shapes of galaxies are spiral, some are ellipses and others have irregular sh...

**What do galaxies consist of? What is a nebulae?** The galaxies consist of million of stars and nubelae. The nubelae is a cloud of gas and dust. 2. **Name the shapes of galaxies. What is the name of our Galaxy?** The shapes of galaxies are spiral, some are ellipses and others have irregular shapes. The name of our Galaxy is The Milk Way. 3. **How is the shape of our Galaxy and where is the Solar System on it?** The Milk Way is a spiral galaxy and it has a central poin called arms The solar system is on one of them. 4. **Name the two most famous constelattions on the Solar System. Explain the Ursa Minor and the Polar Star.** They are Ursa Major and Ursa Minor. Ursa minor consists of seven stars and one of them is the Polar Star. It's the brighteness. 5. **What are stars and what do they produce?** The stars are celestial body of gas that shines. They produce energy for example heat and light. 6. **Name the parts of the sun and explain one of them.** The sun has three parts: - The core: is the centre of the star, where energy is generated. - The mantle: around the core, is the place where energy is transported to the surface. - The atmosphere: is the outer part of the star. It is divided into the chromosphere, photosphere and solar corona, from the inside outwards. 7. **Name the inner planes and explain one of them.** They are Mercury, Venus, Earth and Mars. All of them are solid, formed by a crust and an iron core. Mercury is the closest to the Sun and the smallest. It has no atmosphere and for this reason, meteroites collide with its Surface and leave marks called craters. 8. **Name the outer planets and explain one of them.** They are Jupiter, Saturn, Uranus and Neptune. Uranus is the third largest and the coldest of them all. It is a blue colour. It has satellites and circled by rings. 9. **Name the dwarf planets and explain one of them.** They are Pluto, Ceres and Eris. Ceres is the smallest, which was previosuly thought to be the biggest asteroid. 10. **Name four celestial bodies and explain one of them.** Satellites, comets, asteroids and meterorites. The meteorites are pieces of rock that are too small to be considered asteroids or comets. They can hit other celestial bodies, for example the craters of the moon.