Pluto, Comets, Asteroid Belts, and Stars

This is week 5 of of our solar system unit. As we wrap things up we take a peak at Pluto, comets, the asteroid belt, and stars. Lots of fun, hands on science projects, and more.
Constellation Projector - a fun science project for kids to see star in a diy planetarium at home. Includes free printable constellation mini book to use to make constellations on your wall. (homeschool, science activity, solar system, planets, kindergarten, first grade, second grade, third grade, fourth grade, fifth grade, sixth grade)
This is the final week in our solar system unit. We have had so much fun with hands on science projects and learned so much along the way. (mom too!)

This week we focused on the dwarf planet Pluto, space rocks and the Asteroid Belt, Comets, and Stars plus the patterns or constellations they make.

We took a closer look at the planet just past the Kuiper belt (like the asteroid belt, but with objects looking more like comet nuclei than asteroids)comets, stars, and  Pluto.


Pluto is a small planet which after the 2006 International Astronomical Union’s decision is no longer a planet.. Up until this point we’ve known very little about this dwarf planet on the outer edge of our solar system, but in July 2015 the spacecraft New Horizons arrived there after its 9 1/2 year voyage to further explore this curious planet.

Pluto Solar System Project for Kids

Since Pluto is so cold we made ice cream in a bag. (complete instruction ice cream in a bag

The science behind this experiment is the rocks salt helps lower the freezing point of the ice cream.

Comets, Asteroids, and more!

We learned a little about the millions of space rocks that orbit our sun, most of which are in the Asteroid belt between Mars and Jupiter.  We learned that another word for comet is a dirty snowball because it is a mixture of dirt and ice. We discussed some famous comets (Halley’s comet, Hale-Bopp, etc.) and others that won’t return in our lifetimes.

We found that unlike planets with a mostly spherical orbit, comets and an elliptical orbit.
We learned that most meteors burnt up in earth’s atmosphere and appear to be shooting stars from here on earth. There is a place in Antarctica where the ground is covered with 10,000 meteorites.
Did you know that Asteroid Belt might have been another planet?  This is called the exploded planet hypothesis and might have been the most interesting thing we learned.


We learned taht a star is an object that is something like our sun and that they are actually outside our galaxy. On a cloudless night with a new moon you can see 3,000-10,000 stars. Stars are categorized by how hot/cold and bright/dim they are. We were surprised to learn that our sun is a G-5 which means medium temperature, and medium dim.

We took a look at constellations with this free printable Constellations Mini Book. We found out that you cannot see the same constellations all year, but rather as our earth orbits we get a different view of the stars. Those of us in the Northern Hemisphere though can always see the Little Dipper and the North Star which is called Polaris.
which stars we see at night changes every month and season of the year

I showed them this simple, but meaningful example. Each section of the drink umbrella had different holes poked through. Then I roughly drew the earth on a grape and stuck the umbrella stick threw it. We located North America and the sky section above it. The kids realized we wouldn’t be able to look back through the earth to see the back part of the sky. Then we rotated the grape and they were able to visualize how our ever-moving earth gets a new view of the heavens all year long.

DIY Constellations Projector

constellation project omake a star planetarium at home science project

Our favorite project was making this constellation projector. It was such a fun science project that allowed kids to see the constellations in our own make shift planetarium.
To make your own you will need:
Now cut out the pages from the constellations mini book and use a star hole punch to punch out the large (brighter) stars. Use a toothpick to make little holes where the small circles are for smaller stars.
Next you will cut a hole in your box and tape the constellation you wish to see first. Now insert the flashlight in the opposite side of the box (depending on the box you are using you may need to make another hole). Make sure all other holes and cracks are closed/sealed so the light will be forced through the star pattern.

make a planetarium at home with this fun science project for kids studying stars or the solar system

Shine your constellation projector at a wall in a dark room for an amazing at home planetarium!

HINT: Sorry the stars look like they have shadows in the picture, that was just because of the shutter speed I had to use to get his mostly dark picture; the projector will not create shadow stars!

Solar System - fun, free hands on scinece unit for elementary homeschool students See the rest of our solar system unit here!

Science Fun for Kids

Beth Gorden
Beth Gorden

Beth Gorden is a homeschooling mother of six who strives to enjoy every moment with her kids through hands-on learning, crafts, new experiences, and lots of playing together. Beth is also the creator and author of 123 Homeschool 4 Me where she shares 1000+ free printables, creative homeschool lessons, crafts, and other fun ideas to help preschool and homeschooling families have fun while learning and exploring together.