Just make sure you wear layers or long sleeve/hoodie to avoid flying insects! He has flown on six Shuttle missions, and holds several advanced degrees. The sail itself would be a thin aluminized sheet. Tera (trillion) – American use, one followed by 12 zeros Terminator – Boundary of a planet or moon separating the lighted from the unlighted sides. Despite being completely immobile as a result of Lou Gehrig's disease, he has written numerous books to bring astronomy, physics, math, and cosmology to the general public.

This is a red hypergiant, and the red colour tells us that the surface temperature of this enormous star is much cooler that our Sun - maybe only 2, 500 degrees Celsius. The twinkling (or "scintillation") that we see is a result of light having to pass through Earth's turbulent atmosphere. Our atmosphere has several layers, each with a slightly different density and temperature. so that light passing downwards will be bent ("refracted") by small, random amounts many times before reaching an observer , e.g. read online. Oort cloud – Cloud of cometary nuclei that surrounds the sun at a distance of many thousands of astronomical units. Open cluster – System containing a few dozen to a few thousand stars that formed from the same stellar nursery. Opposition – Best time to observe a planet. The moment a planet far from the sun than Earth appears opposite the sun in the sky. Optical double – Two stars at different distances that lie along nearly the same line of sight and thus appear close together , cited: home-investments.com. Sally Ride, the first female American Astronaut, Colonel Guion Bluford, the first African-American in space and many more http://nisisolutions.com/lib/destination-mars-in-art-myth-and-science. Turning these scientific images into amazing images of the cosmos is not easy, as all of these variables have to be tweaked by hand. That’s called image processing — and it is a mixture of science and aesthetics. Astronomy PowerPoint Presentations free to download. Free Astronomy Powerpoint Presentations Great for KS1 KS2 KS3 KS4 and post 16 A level lessonplans, K-12 and more. Use and alter these presentations freely or any power point template used in this presentations site for other teachers http://howtobeacooldad.com/library/mars-the-story-of-the-red-planet-by-p-cattermole-1992-09-17.

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