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You will need! - One empty 35mm plastic film canister and lid. These are getting harder to find, but stores that develop film should have some. (The white canisters work much better than the black ones do.) - One fizzing antacid tablet (such as Alka-Seltzer – Get this from your parents) - Water - Safety goggles What to do? Put on those safety goggles and head outside – no really, when this works, that film canister really flies! If you want to try the indoor version, do not turn the canister upside down in step 5.  Break the antacid tablet in half. Remove the lid from the film canister and put a teaspoon (5 ml) of water into the canister. Do the next 2 steps quickly Drop the tablet half into the canister and snap the cap onto the canister (make sure that it snaps on tightly.) Quickly put the canister on the ground CAP SIDE DOWN and STEP BACK at least 2 meters. About 10 seconds later, you will hear a POP! and the film canister will launch into the air!

Our Solar System. Big, small but round. But, why all the planets and stars are round?  The eight planets in our solar system differ in many ways. They are of different sizes. They are different distances from the sun. Some are small and rocky, and others are large and gaseous. But all are nice and round. Why is that? Why don't they have cubes, pyramids or discs? Planets are round because of a process known as "spherical shape formation". This process is caused by the forces of gravity and centrifugal force. Gravity is the force that pulls all objects towards the center of mass. The stronger the gravity, the more compact an object will be. As a planet forms, the gravity of all the matter within it causes it to pull together and become denser. This results in the planet becoming more and more spherical in shape. Additionally, as a planet spins on its axis, the centrifugal force caused by this rotation also contributes to the spherical shape.

Within the Solar System, the average temperature on: • Pluto is around -235°C, • Neptune around -220°C, • Uranus -210°C, • Saturn -184°C, • Jupiter -153°C. • The temperature on Mars varies between about -87°C and -5°C, with an average of around -46°C. • The lowest natural temperature on Earth (recorded at Vostok, Antarctica in 1983) is -89°C; the highest surface temperature on Earth (recorded at Al 'Aziziyah, Libya in 1922) is 58°C; the mean overall temperature on Earth is 14°C. Planet Biography. Planets Surface Temperatures. Why temperatures differs from planets to planets? In general, the surface temperature decreases as the distance from the sun increases. Venus is an exception because its dense atmosphere acts as a greenhouse and heats the surface above the lead's melting point of 880 ° F (471 ° C).

Planet: Saturn 1: - Saturn's rings are only a few hundred million years old. 2: - The Spitzer infrared telescope recently discovered another ring around Saturn. 3: - The rings of Saturn are formed by bright particles of water ice. 4: - But, the new Saturn ring is composed of dark dust particles, not water ice, and extends from 8,000,000 miles to 12,000,000 miles from the center. 5: - The planet Saturn has a lower density than water. Then, if placed in water it would float. 6: - The moon Titan of Saturn has hundreds of times more oil and natural gas than all known reserves on Earth. 7: - Saturn is not only the planet with rings, Neptune also has its own ring system.

Sun 1: - The Sun was approximately 10 times brighter than it is today, after forming from its interstellar gas cloud. 2: - The Sun produces so much energy, that every second the nucleus releases the equivalent of 100 billion nuclear bombs. 3: - The strongest color light emitted by the sun is green, but we see the combination of all the colors of the sun as white light. 4: - The average temperature on the surface of the Sun is 6,000 ° C. The brown dwarf star CFBDSIR 1458 10b is not hotter than a cup of coffee. 5: - The center of the Sun is about 27 million degrees Fahrenheit (15 million ° C). 6: - Our Sun can be gigantic but it still loses 360 million tons of materials every day. 7: - Every second, the Sun pumps more than one million tons of materials into space through the solar wind (electrically charged particles). 8: - The Sun takes about 220 million years to make a revolution of the Milky Way. 9: - If the Sun became a Black Hole, it would