By Robert Gardner
Why does not the Moon fall to Earth? Why do the seasons swap? what's parallax? how are you going to simulate weightlessness on the earth? younger scientists will discover the sunlight method via utilized house technological know-how answering questions on area. The far-out house experiments during this booklet may help scholars make a version of a lunar eclipse, construct a spectroscope, and extra! Many experiments contain rules scholars can use for technology reasonable initiatives.
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Extra info for Ace Your Space Science Project
You know from Chapter 2 that it is only 150 million kilometers (93 million miles) from Earth. You may not think of the Sun as being close to Earth. To travel that far, you would have to circle Earth 3,750 times. Even the light from the Sun takes 8 minutes and 20 seconds to reach Earth. But compared to other stars, the Sun is not far away at all. To get to the next closest star, you would have to travel 40 trillion kilometers (40,000,000,000,000 km), or 25 trillion miles. Even if you could travel at the speed of light, it would take you more than four years to reach that star.
In the case of receding stars, astronomers say the light has a red shift because the wavelengths of the light emitted are longer than would be the case if the star were at rest. Similarly, approaching stars show a blue shift. Knowing the speed of light and the amount that known wavelengths emitted by various elements in the stars are shifted, astronomers can determine the speed that stars are moving toward or away from us. By comparing the red shifts or blue shifts of stars turning on their axes, astronomers can tell which way a star is spinning.
Is the pencil’s shortest shadow parallel to the north-south line you established earlier? After sunset you can bring the paper inside and determine the Sun’s position in the sky at various times during the day. Draw a north-south line (through the shortest shadow) and east-west lines on your paper. Each line should pass through the point where the pencil was located. The Sun’s azimuth is its angle along the horizon relative to north. North is 0°; east is 90°; south is 180°; and west is 270°. With a protractor, determine the Sun’s azimuth for each line you drew.
Ace Your Space Science Project by Robert Gardner