•📖 STUDYING 📖•

• Mercury, Venus, Earth, Mars are called terrestrial planets because they have rocky surfaces.
• Jupiter, Saturn, Uranus, Neptune are gas giants because they are mostly made up of gases like hydrogen and helium.
• The sun is at the center of our solar system
• Meteorites are pieces of rock or metal from outer space that fall to earth
• Comets are balls of ice, dust, and gas that travel through space
• Asteroids are small rocks that orbit around the sun between mars and jupiter
• Asteroids are small rocks that orbit around the sun
• Pluto is now classified as a dwarf planet
• The sun is made up mostly of hydrogen and helium
• Jupiter, Saturn, Uranus, Neptune are gas giants
• Venus rotates backwards
• Mercury, Venus, Mars, Earth are rocky planets
• Sunspots are dark spots on the surface of the sun caused by cooler areas
• The sun's atmosphere is called the corona
• The sun's core is very hot (15 million degrees Celsius)
• Earth is third closest to the sun
• Earth has an atmosphere with oxygen and nitrogen which protects us from radiation and keeps us warm
• Venus is second closest to the sun
• Mercury is closest to the sun
• Venus has an atmosphere with lots of carbon dioxide which traps heat making its surface very hot
• Supernovae are explosions caused by dying massive stars
• Mercury has no atmosphere
• Black holes are regions of space with such strong gravity that nothing can escape them
• Mars has volcanoes but they have not erupted since it was formed
• Mars has volcanoes but no plate tectonics
• Saturn's rings were discovered by Galileo
• The sun's transition region is where the temperature changes rapidly
• Comets have a nucleus (solid), coma (gas) and tail (dust)
• Jupiter has a red spot which is a storm that has been raging since at least 1830
• Earth's crust is made up of tectonic plates that move slowly over time
• The sun's chromosphere is where solar flares occur
• Solar wind is charged particles from the sun that travel through space at high speeds
• Solar wind is charged particles from the sun's atmosphere that stream out into space at high speeds
• Comets have a nucleus (solid core), coma (cloud of dust and gases) and tail (stream of ice vapor)
• The sun's photosphere is where most of the energy comes from
• A solar flare is an explosion that occurs on the surface of the sun