Earth and space

• the sun is made up of hydrogen and helium
• the sun is 4.5 billion years old
• the sun is a yellow dwarf
• solar wind is the stream of high energy sent to space
• solar wind causes aurora borealis and australis
• aurora australis happens in the southern hemisphere
• aurora borealis occurs in the northern hemisphere
• prominences are storms that looks like arches in the sun
• solar flares are more intense solar storms than prominences
• suunspots are cool black spots that are also storms in the sun
• the six layers of the sun are the core, radiation zone, convection zone, photosphere, chromosphere, and the corona
• the core of the sun is where nuclear fusion occurs and the innermost layer
• the two zones in the layer of the sun is the radiation and convection zone
• the layer of the sun visible to us is the photosphere
• the orange layer in the sun is called the chromosphere
• the outermost layer of the sun that extends thousands of miles is the corona
• mercury is the smallest, closest, has no atmosphere
• venus is the hottest, iron core, slowest rotator
• earth is the only known planet to harbor life
• mars is the red planet and has iron dust
• jupiter is the biggest planet with great red spots
• saturn is the planet with rings
• uranus i the coldest ice giant that rotates sideways
• neptune is the windiest planet
• our galaxy is called the milkyway galaxy
• comets are dirty snowballs with a head, tail and a body.
• a comets tail always points away from the sun
• meteors are meteoroid already burning in the atmosphere
• meteors are also known as shooting stars
• meteorites are meteoroids that hasnt burned up completely
• the asteroid belt is located between mars and jupiter
• a blackhole is a collapsed star with an immense gravitational force that even light cannot escape
• a quasar is a celestial object that emits large amount of energy
• radio pulsars are radio signals emitted by dying stars
• a neutron star is a collapsed star
• tides are the rise and fall of sea level causes by the gravitational pull of the moon and sun
• spring tides are the strongest tides which happens when the moon, sun, and earth is aligned in a straight line
• neap tides are the weakest tides which happens when the moon, earth, and sun forms a 45 degree angle
• polaris is big dipper's handle and is also known as the north star
• sirius is also known as the dog star