Download Beyond the Solar System: Exploring Galaxies, Black Holes, by Mary Kay Carson PDF

By Mary Kay Carson

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Humans have gazed into the evening sky for hundreds of thousands of years and puzzled, What are these twinkling lighting? although the sunlight, moon, and planets moved around the heritage of stars, the celebrities themselves seemed immovable, without end fastened in constellations. simply whilst astronomers started taking a more in-depth glance did somebody discover what a desirable, ever-changing universe lies past our sun system—red immense and white dwarf stars, spiral galaxies, wispy nebulae, black holes, and masses more.

In Beyond the sun System, writer Mary Kay Carson strains the evolution of humankind’s astronomical wisdom, from the belief that we aren't on the middle of the universe to contemporary telescopic facts of planets orbiting stars open air our sunlight approach. as well as its attractive background, this publication includes 21 hands-on initiatives to extra discover the themes mentioned. Readers will construct a 3-dimensional illustration of the constellation Orion, version the warping of space-time as a result of a black gap, see how the universe expands utilizing an inflating balloon, and build a reflecting telescope out of a make-up reflect and a magnifying glass. Beyond the sunlight System additionally contains minibiographies of recognized astronomers, a time line of significant medical discoveries, a advised analyzing record, a thesaurus of technical phrases, and a listing of web sites for extra exploration.

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Additional info for Beyond the Solar System: Exploring Galaxies, Black Holes, Alien Planets, and More; A History with 21 Activities

Sample text

An astronomer might see one star exploding and another one being eclipsed on the same night. But because of the stars’ differing distances from Earth, the two events may have happened millions of years apart in time. In fact, not only is time relative, so is space itself. Einstein called it space-time. Time is a fourth dimension, inseparable from space. ” Exactly where something is depends on when. There is no here separate from now. There is only here-and-now. Space and time. That’s space-time.

Now. Putting spectroscopy to work in astronomy gave him a new way to study the stars. By looking at the lines of starlight spectra he could find out what elements were contained in stars of all sorts. All he needed to do was figure out how to hook up a spectroscope to his telescope. It was easier said than done. Starlight is faint, so Huggins had to work in near dark- ness in order to see the spectra created. He designed a new kind of spectroscope that could be swapped out with the eyepiece of his telescope.

Factories, cities, and citizens welcomed lit-up living rooms and phone calls from friends. But the discovery that enabled many of these inventions—electromagnetism—created a pile of questions that scientists couldn’t answer. 53 54 beyond the Solar System The behavior of electricity and magnets poked holes in the ideas of Isaac Newton that had guided science for nearly 300 years. Newton’s law of gravity said that objects in the universe are attracted to each other. The strength of that attraction depends on the size, or mass, of those objects and the distance between them.

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