Uranus Neptune ice giants Atmosphere H He and traces of methane Methane absorbs

Uranus neptune ice giants atmosphere h he and traces

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Uranus & Neptune – ice giants; Atmosphere: H, He, and traces of methane, Methane absorbs red light, giving planets their bluish colors, Mantles: water, ammonia, and methane “ices”, Superheated (2,500 - 5,000º C) and high pressure, Cores: rock and ices. What are jovian planets like? Thick hydrogen, helium atmospheres, Layered interiors with very high pressure and cores made of rock, metals, and hydrogen compounds Very high pressure in Jupiter and Saturn can produce metallic hydrogen, All have strong storms and winds, What kinds of moons orbit jovian planets? Moons of many sizes, Many major moons show signs of geological activity, Tidal heating drives activity, Titan is the only moon with a thick atmosphere, What are Saturn’s rings like? Made up of countless individual ice particles, Extremely thin with many gaps, How do other jovian ring systems compare to Saturn’s? Much fainter ring systems with smaller, darker, less numerous particles , Why do the jovian planets have rings? Ring particles are probably debris from moons. A comet has three basic parts: Nucleus - the dark dirty snowball composed of ices and dirty dust, Coma - cloud of gas and dust surrounding the nucleus, Tail - in this case, both the dust and ion tail. Nucleus: Mostly water ice, some solid dust; “dirty snowballs” Coma: When a comet nears the Sun, its ices start to vaporize; jets of dust and gas erupt from its surface Produces a cloud around the nucleus called the coma. Tails: Gas tail - atoms of gases from the comet; Dust tail: smokesized particles (smaller than household dust) A comet’s tail always points away from the Sun! Meteoroid: A bit of interplanetary debris that falls through Earth’s atmosphere Meteor: A streak of light caused by a meteoroid, Commonly called a “shooting star” Meteorite: A space rock on the ground Types of meteorites: Stonys, 94% of meteorite falls, Rocky composition; Irons, 5% of meteorite falls, Iron-nickel alloy; Stony-Irons, 1% of meteorite falls Mixtures of iron-nickel alloy and rocky material Sun’s energy output = 3.8 x 10^26 Watts Fission: Big atomic nucleus splits into smaller pieces (like in nuclear power plants); Fusion: Small atomic nuclei combine to make a bigger one (Sun, stars) The Sun: The Sun’s size, composition, and temperature, The Sun generates energy through hydrogen fusion in the core, That energy first moves through the radiative zone of the Sun as light, Then it warms the gas in the convective zone of the Sun and that hot, gas bubbles up to the photosphere, producing granules; Thermal Radiation, Hot objects naturally give off light, The color of that light depends on the temperature of the object, The Sun and other stars light comes from this thermal radiation;
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