Question | Answer |
What does a telescope collect from space? | electromagnetic radiation |
What does the Earth's atmosphere do to gamma rays and x-rays? | block them |
What is the imaginary sphere that surrounds the Earth? | celestial sphere |
Name 3 types of electromagnetic radiation found on the spectrum? | microwave
visible light
radio wave |
How did Hubble tell the universe was expanding? | most of the galaxies were moving away from each other |
Why do the scientists put the X-ray telescopes in space? | to avoid interference from the Earth's atmosphere |
What theory do the observations of red-shift support? | that the universe is expanding |
What do all the wavelengths of the electromagnetic radiation make up? | the whole electromagnetic spectrum |
Who showed that planets move in elliptical orbits around the sun? | Kepler |
Who showed that gravity keeps planets and moons in orbit? | Newton |
Who was one of the first astronomers to use a telescope to observe objects in space? | Galileo |
Who proved that there were many galaxies? | Hubble |
Who created an Earth-centered theory of the universe? | Ptolemy |
Who created a sun-centered theory of the universe? | Copernicus |
What is a year? | the time it takes for Earth to orbit once around the Sun |
What is a day? | the time it take Earth to rotate once on its axis |
What is altitude? | the angle between the object in the sky and the horizon |
What is a constellation? | a region in the sky with a recognizable star pattern |
What is a month? | the time it takes for the moon to orbit once around the Earth |
What is the horizon? | the line where the sky and Earth appear to meet |
What is a refracting telescope? | an instrument that uses lenses to focus light |