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PowerPoint Presentation: Earth’s Moon The Earth is unique among the planets in having a large satellite, the Moon, which, relative to the Earth, has the largest mass of any satellite - parent system. The Moon affects the oceanic tides The Moon helps stabilize our planet so that Earth’ axis of rotation stays in the same direction.We had much less climatic change than if the Earth had been alone. The Earth's rotation is slowed through interactions with the Moon.
If the Moon had never existed, the Earth would be spinning much faster. In fact, our day would probably only be about 6 hours long!
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The fast rotation rate would lead to faster winds and stronger storms. Lunar calendar is based on the Moon’s rotation which is 28 days from new to full moon. Agriculture was grown and harvested during certain phases of the moon. The Moon’s gravity affects the Earth’s crust. The Moon helps heat the Earth and influences the movements of the tectonic plates.
No other planet in our solar system has tectonic plates. PowerPoint Presentation: Why would clouds form a hexagon on SATURN’S NORTH POLE? Nobody is yet sure. Originally discovered during the Voyager flybys of Saturn in the 1980s, nobody has ever seen anything like it anywhere else in the Solar System. The bizarre cloud pattern shown above is an infrared image taken by the Saturn-orbiting Cassini spacecraft.
The images show the stability of the hexagon even 20 years after Voyager. Movies of Saturn's North Pole show the cloud structure maintaining its hexagonal structure while rotating. Unlike individual clouds appearing like a hexagon on Earth, the Saturn cloud pattern appears to have six well defined sides of nearly equal length. Four Earths could fit inside the hexagon.
PowerPoint Presentation: SATURN’S SOUTH POLE A hurricane-like storm two-thirds as wide as the Earth is raging on Saturn's south pole, new images from the Cassini spacecraft reveal. Such clear hurricane-like features have never before been seen on any other planet, but scientists are not sure what is causing them. The dark eye of the 'hurricane' spans about 8,000 kilometres and is surrounded by rings of clouds that tower about 30 to 75 kilometres above it. These eye-wall clouds have never been seen anywhere other than on Earth in a hurricane. But Saturn's storm also differs from hurricanes on Earth because it is fixed in place - above the south pole - and is not powered by an ocean, since Saturn is a gaseous planet. It is unclear how long the storm has been there because Cassini has never before seen the pole at such a high resolution. PowerPoint Presentation: Eighty-Year Old Mystery in Outer Space In 1918, astronomer Heber Curtis discovered a jet of matter coming from g alaxy M87 which he described as 'a curious straight ray'.
This jet extends at least 5000 light-years from the nucleus of M87 and is made up of matter ejected from the galaxy. This phenomena is most likely created by a SUPER MASSIVE BLACK HOLE! Astronomers believe that the black hole in this galaxy has a mass of approximately 6.4 billion (6.4×109) solar masses. In pictures taken by the Hubble Space Telescope in 1999, the motion of M87's jet was measured at four to six times the speed of light. (The speed of light is 186,282 miles per second.
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A light year in miles is 5,880,000,000,000 miles, or 5.88 trillion miles.). PowerPoint Presentation: WHAT IS A NEBULA?
A nebula is a cloud of gas and dust in space. Some nebulas are regions where new stars are being formed, while others are the remains of dead or dying stars. Nebulas come in many different shapes and sizes. There are four main types of nebulas: Planetary nebulas: are created when a star blows off its outer layers after it has run out of fuel to burn. These outer layers of gas expand into space, forming a nebula which is often the shape of a ring or bubble - called planetary nebulae because they were round like the planets. At the center of a planetary nebula the glowing, left-over central part of the star from which it came can usually still be seen. Reflection nebulas: is a cloud of gas and dust which does not create its own light, but instead shines by reflecting the light from nearby stars.
The brightest reflection nebulas are places where new stars are being formed. Here the gas and dust is thick and shines by the light of new, bright stars. Emission nebulas: is a cloud of hot, glowing cloud of gas and dust in space. These nebulas absorb the light of nearby stars and reach very high temperatures. The high temperature causes them to glow. Absorption nebulas: is a cloud of gas and dust which blocks light from the regions of space behind it. As light from space reaches an absorption nebula it is absorbed by it and does not pass through.
Absorption nebulas do not create their own light. It is hard to find an absorption nebula unless it is silhouetted against much brighter region of space.