Space is big

• • universe is a large collection of billions of galaxies 
• Galexy is a large collection of billions of stars held together by gravity
• Our solar system is the milkey way galaxy
• Sun is a large ball of gass - mostly hydrogen some helium and traces of other elements
• Suns diamater is over one million km
• a reaction in the suns core called nuclear fusion keeps sun hot
• Sun is about 5 billion years old (same age as earth)
• sun in 150 km away from earth - takes light 8 minutes to travel that distance
• Sun is the closest star to earth which is why it is brightest
• Dark areas on the sun are called sunspots
• outermost layer of the sun called Corona
• Suns magnetic field is Heliosphere
• about one million earths can fit inside sun
• sun contains 99.8% of the solar systems mass
• Aurora occurs when the suns magnetic field interacts with earths atmosphere
• in about 5 billion years the sun will turn into a red giant planet