The Sun and Stars
This is the primary source of energy for Earth, produced through nuclear fusion in its core.
(What is the Sun?)
This is the closest planet to the Sun and has no atmosphere or moons.
(What is Mercury?)
his largest planet has a Great Red Spot that is a massive storm.
(What is Jupiter?)
This is Earth's natural satellite that causes tides and has phases.
(What is the Moon?)
This is the average distance from Earth to the Sun, about 150 million kilometers.
(What is an astronomical unit or AU?)
This layer of the Sun's atmosphere is visible during a total solar eclipse as a glowing halo.
(What is the corona?)
This planet is often called Earth's "twin" due to similar size but has a runaway greenhouse effect.
(What is Venus?)
This planet is famous for its prominent ring system made mostly of ice particles.
(What is Saturn?)
This dwarf planet is located in the Kuiper Belt and was formerly considered the ninth planet.
(What is Pluto?)
This unit measures vast interstellar distances and is about 9.46 trillion kilometers.
(What is a light-year?)
These dark, cooler areas on the Sun's surface are caused by intense magnetic activity.
(What are sunspots?)
This planet has liquid water, an atmosphere with oxygen, and is the only known planet with life.
(What is Earth?)
This blue-green planet has the strongest winds in the solar system.
(What is Neptune?)
These rocky objects orbit between Mars and Jupiter in the asteroid belt.
(What are asteroids?)
This effect causes stars to appear to shift position as Earth orbits the Sun.
(What is parallax?)
These explosive events on the Sun can disrupt Earth's communications and power grids.
(What are solar flares?)
This red planet has the largest volcano in the solar system, Olympus Mons.
(What is Mars?)
These two outer planets are classified as ice giants rather than gas giants.
(What are Uranus and Neptune?)
hese icy bodies with tails develop when they approach the Sun.
(What are comets?)
This is the time it takes light from the Sun to reach Earth.
(What is 8 minutes and 20 seconds?)
The Sun is classified as this type of middle-aged star on the main sequence.
(What is a yellow dwarf or G-type star?)
These two planets are the innermost terrestrial planets and lack natural satellites (moons).
(What are Mercury and Venus?)
This gas giant has a faint ring system and was the first planet discovered with a telescope.
(What is Uranus?)
This is the largest moon of Jupiter and may have a subsurface ocean.
(What is Ganymede?)
This method uses brightness comparison to determine distances to stars.
(What is the standard candle or cepheid variable method?)