What was the ancient Greek theory of the universe that placed Earth at the center?
What is the geocentric theory?
What is the name of the cloud of gas and dust from which the solar system formed?
What is a nebula?
What is the largest planet in our solar system?
What is Jupiter?
What is the term for the phase when the Moon is fully illuminated?
What is a full moon?
How long does it take for Earth to orbit the Sun?
What is one year (365.25 days)?
What instrument did Galileo use to observe celestial bodies?
What is a telescope?
Which planets formed first?
What are the outer planets (gas giants)?
Which planet is known as the Red Planet?
What is Mars?
The space race to out the first astronaut on the moon was between what two countries?
What are the U.S. and the Soviet Union?
What causes day and night on Earth?
What is Earth's rotation on its axis?
Who was the first to propose that the Sun is at the center of the solar system?
Who is Copernicus?
What process led to the sun forming?
What is fusion?
How many stars are in our solar system?
What is one- the sun?
What are the dark, flat regions on the Moon's surface called?
What are maria?
What phenomenon causes the seasons on Earth?
What is Earth's axial tilt?
Which astronomer theorized that the planets move in small circles within larger orbits?
Who is Ptolemy?
What process leads to the formation of planets from smaller particles of metal and rock?
What is accretion?
What are four differences between the rocky planets and the gas giants?
What is rocky planets are smaller, more dense, made of rock, have fewer moons, no rings and are closer to the sun? (need 4 of these)
How many days does it take for the Moon to complete one full cycle of phases?
What is about 29.5 days?
How long is the Moon's rotation and revolution around Earth?
What is 27.3 days?
Who discovered the moons revolving around Jupiter?
Who is Galileo?
About ho long ago did the solar system begin to form?
What is about 4.6 billion years ago?
Which planet has longer days than years?
Mercury
What phase comes after the new moon?
What is the waxing crescent?
How many degrees is the Earth's axial tilt?
What is approximately 23.5 degrees?