Astronomy

• Sun - a hot glowing ball of hydrogen and helium, a 4.5 billion year old yellow drawf star
• Solar Wind - a stream of high energy particles sent into space
• Auora Borealis - Northern Lights
• Aurora Australis - Southern Lights
• Prominences - storms that look live huge arches; may last several days
• Solar Flares - more intense than prominences; only lasts about 15min.
• Sunspots - cool black storm areas
• Mercury - smallest and closest planet to the sun
• mercury and venus are the planets that doesn't have moons and atmosphere
• Venus has a core of molten iron
• Earth is the only habitable planet in the solar system
• Venus is the hottest planet in the solar system
• Mars is the red planet
• Jupiter is the largest planet in the solar system
• Uranus is tilted on its side
• Saturn's rings are made up of ice and rock particles
• Mars has the highest mountain in the solar system
• Mt. Olympus is the tallest mountain in the solar system
• Jupiter - has the great red spot
• Jupiter - has the shortest day (10 hours)
• Venus - has no moons, but it does have clouds that reflect sunlight
• Neptune - has the strongest winds in the solar system
• Venus - has the longest day (243 Earth days)
• Saturn - has prominent rings
• The solar system is in the Milky Way Galaxy
• Asteroid Belt are rocky objects orbiting the sun between Mars and Jupiter
• Comets are made up of ice, dust, gas, and rocks
• Meteorites are space rocks that fall to Earth's surface
• comets - "dirty snowballs"
• comets - with tails of dust and gases
• meteor - a meteoroid that burns up in the atmosphere
• meteorite - a meteoroid that doesn't completely burns up
• Before the small bit of comet or asteroid enters Earth’s atmosphere, it floats through interplanetary space and is called a meteoroid
• The largest asteroid is Ceres (940 km diameter)
• The chunk that has survived its fiery journey through the earth's atmosphere is called a meteorite
• Meteor - "shooting star"
• Moon is Earth's natural satellite
• black hole - collapsed stars that resulted to huge gravitational forces where even light cannot escape
• quasars - massive, remote celestial objects emitting remarkably large amounts of energy
• Radio Pulsars - are intermittent radio signals emitted by dying stars (neutron star)