How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
Science final (space stuff)
created a sun-centered theory of the universe
proved that there were many galaxies
showed that gravity keeps planets and moons in orbit
created an earth-centered theory of the universe
showed that planets move in elliptical orbits around the sun
was one of the first astronomers to use a telescope to observe 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 its axis
the line where the sky and the earth appear to meet
a region of the sky that contains a recognizable
the time required for the earth to orbit once around the sun
the apparent path of the sun across the celestial sphere as seen from earth
one can tell how far north or south an object is from the celestial equator by the object's _______
the imaginary sphere, created by scientists, that surrounds the earth
all of the wavelengths of electromagnetic radiation
where scientists put telescopes to avoid interference from earth's atmosphere
an imaginary point directly above an observer's head.
the very large array
the largest telescope.
the vernal equinox is used to establish a star's_____