I I Ttivi

ID tpf r

ACROSS -

2. Space between galaxies 5. A gas that is found in air

7. There is more_between the stars than between the planets.

8. The system we live in (first word) P. _dioxide is a gas.

DOWN

2. The space between planets

3. The space between stars

M. It is made of different gases. 6. Another gas that »s part of Earth's air

Our solar system is made up of the Sun and all the objects that orbit, or go around, the Sun.

The Sun is the only star in our solar system. It gives heat and light to the nine planets in the solar system. The planets and their moons all orbit the Sun. The time it takes for each planet to orbit the Sun is called a year. A year on Earth is 365 days. Planets closer to the Sun have shorter years. Their orbit is shorter. Planets farther from the Sun take longer to orbit, so their years are longer. A year on Pluto is 248 of our years!

Asteroids, comets, and meteors are also part of our solar system.

Underline:

The solar system is: the Sun without the nine planets.

the Sun and all the objects that orbit it.

I I is the center of our solar system. I I is the only star In our solar system.

0 is a planet in our solar system.

1 | gives heat and light to our solar system.

_ Is the time it takes for a planet to orbit the Sun.

Write:

month year

Planets closer to the Sun . . . Planets farther from the Sun .

have a longer year, have a shorter year.

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