In 2006, these space objects were reclassified and Pluto became a __________________ because it orbits the sun but has not cleared the area of its orbit.

Most large space rocks are located between the orbits of Mars and Jupiter in a region known as the ___________________.

Most comets are located beyond the orbit of Neptune in a region known as the ______________.

The fuzzy outer layer of a comet created as the comet nears the sun. (Part B in the image)

The solid core of a comet. (Part A in the image -the dark center)

A region where many small objects orbit the sun, it stretches beyond the orbit of Neptune, and contains many of the named dwarf planets.

A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere sometimes called "shooting stars."

A chunk of rock or dust in space, smaller than an asteroid. These usually come from broken apart comets or asteroids.

A chunk of rock that passes through the atmosphere and hits Earth's surface. Earth is hit by tons of these each day but most are smaller than a grain a sand. Larger ones can form massive craters.

One of the rocky objects revolving around the sun, smaller than planets, irregularly shaped, and mostly found between the orbits of Mars and Jupiter.

All stars are called the Sun and are the same size.

An astronomer has found a new object in space. Based on her findings, decide if she should classify this object as a planet.

A planet has no atmosphere. Which of these would be the least likely to be seen from this planet’s surface at night?

What is responsible for keeping planets in orbit around the sun?

The planets orbit around the sun because the sun has the greatest ____________.

Which happened first to form the solar system?

Which of the following drawings most accurately represents the shape of the Milky Way?

Galaxies that do not fit into the spiral or elliptical classifications are called

The average distance between the Sun and Earth is called ...

Which unit is best to measure the distance to Neptune?

To measure the distance to the Andromeda Galaxy (the nearest full-sized galaxy), astronomers would use ...

An astronomical unit is...

Astronomical units are used for

The distance that light can travel in a year is called....

A light year is approximately.....

_______________ would be the best unit to use to measure the distance between the asteroid belt and Pluto

_______________ would be the best unit to use to measure the distance between the our sun and Proxima Centauri (our nearest star neighbor).

An object at the other end of the universe is billions of ___________ away.

What travels the FASTEST?

When we measure how far light travels in a year, we are talking about _ of miles.

A light year is a measure of

What galaxy do we live in?

How long does it take light from the Sun to reach us?

What do stars produce that we use to study them?

What is NASA's main piece of equipment they use to take pictures and study the stars?

Which correctly states the distances from Earth, from closest to farthest?

Light year is a unit of _?_.

Which distance is larger: 1 astronomical unit or 1 light-year?

If an object is 7.4 light years away from Earth, what does this tell you?

A.U. (astronomical units) are used to measure distances between _?_.

Light years are used to measure distances between _?_.

The Universe was created around_____________ years ago.

Which of the following is true? Select all that are correct.

The Earth is________.

CHECK ALL that are true. Read slowly and carefully. DON'T RUSH! YOU HAVE 2 MINUTES!

Is the Earth an Inner or Outer Planet?

Which object in space is larger?

The sun is the anchor point of our solar system because of