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Science notes - -stars are born/made in giant clouds of...

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We see the phases of the Moon because the Moon orbits us each month, so its position compared with the Earth and the Sun changes through its monthly cycle. Like the Earth, half the Moon is always lit by the Sun, and half is in shadow. Because the Moon orbits us once each month, we're always seeing it at different positions relative to the Sun. The different positions show us a different combination of the Moon's light and dark sides - these are the phases of the Moon. The universe is about 14 billion years old & consists mainly of matter, not antimatter – has huge bubbles around which galaxies are gravitationally bound into clusters containing hundreds or thousands of clusters -universe looks largely the same in all directions -most of visible stars within small area(circle) around sun -there’s a black hole at center of galaxy -source of comets is a spherical halo around the sun that emits bits of rock & ice - all the planets move around the sun in the same direction and on generally the same plane
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Unformatted text preview: -stars are born/made in giant clouds of vapour called stellar nurseries -the asteroid belt separates the inner and outer solar system Jupiter: gas giant, solid hydrogen interior, a failed star, protector of earth and the inner solar system – its Galilean moons may have underwater oceans Pluto: recently agreed that it’s a planetoid not a planet, so there are now 8 planets in the solar system Planet: a celestial body in orbit around the sun w/sufficient mass to be nearly round & to have “cleared the neighbourhood” around its orbit -dwarf planet – fulfils first two, small solar system body(SSSB) fulfils only 1 st-8 planets & 3 dwarf Order: universe – galaxy – star & solar systems-there are other solar system s New methods of info: Bigger telescopes, new imaging info Spacecraft have given higher quality images & surface material Theory – a self-consistent description of a phenomena or set of phenomena that satisfies all observational tests of its predictions...
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This note was uploaded on 03/31/2008 for the course E&S Sci 9 taught by Professor Kivelson during the Spring '08 term at UCLA.

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