What does a telescope collect from space and focus for closer observation?
What is the imaginary sphere, created by scientists, that surrounds the Earth?
How did Hubble tell the universe was expanding?
Which of the following indicates that the universe is expanding?
What is an advantage of a reflecting telescope?
What makes up the electromagnetic spectrum?
Where do scientists put telescopes to avoid interference from the Earth's atmosphere?
What is an imaginary point directly above an observer's head?
Which of the following is NOT a type of electromagnetic radiation found on the electromagnetic spectrum?
What does the Earth's atmosphere do to most types of electromagnetic radiation?
How does the Earth's atmosphere affect starlight?
Which of the following telescopes is the largest?
An advantage of reflecting telescopes over refracting telescopes is that
Which of these would be shorter if Earth rotated faster?
Circumpolar stars can be seen all night long during the entire year because they are
The vernal equinox is used to establish a star's
Copernicus's theory was not accepted when he first proposed it because he stated that the sun was
An X-Ray telescope is not used on Earth because X-Rays are
Which of the following scientists thought that the Earth was at the center of the universe?
What blocks most types of electromagnetic radiation?
What did redshift tell Hubble about the universe?
Why do scientists put telescopes in space?
How long does the Earth take to orbit once around the sun?
About how long does the moon take to orbit the Earth?
Which of the following is NOT found on the electromagnetic spectrum?
Ursa Minor is an example of a(n) _____________________.
An instrument that uses a mirror to gather and focus light is a(n) __________________.
The angular distance between a star and the horizon is the star's ______________.
The apparent path of the sun across the celestial sphere as seen from Earth is called the _____________________.
One can tell how far north or south an object is from the celestial equator by the object's _________________.
The amount of time the moon takes to orbit the Earth is roughly a(n) _____________.
An imiginary sphere that surrounds the Earth is the ______________________.
The line where the sky and Earth appear to meet is the ______________.
An imaginary point directly above an observer's head is a _______________.
A region of the sky with distinct star patterns is a ___________________.
The scientist who created a sun-centered theory of the universe.
The scientist who proved that were many galaxies.
The scientist who showed that gravity keeps planets and moons in orbit.
The scientist who created an Earth-centered theory of the universe.
The scientist who showed that planets move in elliptical orbits around the sun.
The scientist who was one of the first astronomers to use a telescope to observe objects in space.
Roughly, the time required for the moon to orbit once around the Earth.
An instrument that uses a set of lenses to focus light.
The angle between an object in the sky and the horizon.
The time required for the Earth to rotate once on it's axis.
The line where the sky and the Earth appear to meet.
A region of the sky that contains a recognizable star pattern.
The time required for the Earth to orbit once around the sun.
An instrument that uses mirrors to focus light.
The distance north or south an object is from the celestial equator.