The Modern Calendar
Telescopes
Mapping the Stars
Earth's Motion
100
The study of the universe.
What is astronomy.
100
This type of telescope uses two mirrors.
What is a reflecting telescope.
100
A region of the sky that contains a recognizable star.
What is a contellation.
100

The furthest north or south that the Sun appears in the sky during the year.

Solstices

200
A division of the year that is based on the orbit of the moon around the Earth.
What is a month.
200
This type of telescope uses two lenses.
What is a refracting telescope.
200
The stars in the sky seem like they are changing from season to season because the Earth does this.
What is revolving around the Sun.
200

The times of year that the Sun appears directly above the Equator.

Equinox

300
The time required for the Earth to orbit once around the sun.
What is a year.
300
Astronomers placed telescopes in outer space because space is missing these two factors which interfere with the images of objects.
What is air pollution and light pollution
300
The angle between an object in the sky and the horizon.
What is altitude.
300

The furthest point from the Sun in Earth's orbit

Aphelion

400
The time required for Earth to rotate once on its axis.
What is a day.
400
All of the frequencies or wavelengths of electromagnetic radiation.
What is electromagnetic spectrum.
400
The distance that light travels in one year; about 9.46 TRILLION kilometers.
What is a light-year.
400

The closest point to the Sun in Earth's orbit

perihelion

500
The Earth is tilted on it's axis. How many degrees is the Earth tilted.
What is 23.5 degrees.
500
This is the only part of the electromagnetic spectrum that humans can see.
What is visible light.
500

What is the name of the star closest to Earth?

the SUN
500

The shape of Earth's orbit and the direction that it orbits the Sun

Ellipse/Elliptical and counterclockwise

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