this galaxy group local group: containing the Andromeda spiral galaxy
Milky Way MIlky way:
solar system:
star: sun
planet:
Venus: planet with extreme greenhouse effect. The atmosphere is rich in S, which blocks radiation from the sun, creating a cooler environment; but carbon dioxide captures solar radiation and blocks heat loss.
Earth:
Mars: Containing liquid water
and all other gaseous planets
Jupiter: the most massive, with numerous moons, Great Red Spot—ancient storm center,
Saturn: cold, moons are little snowballs, Titan tatan—Titan, except Earth The only place it rains outside, but the liquids are methane and ethane - so cold that the water forms hard mountains.
Uranus
Neptune: discovered after the invention of the telescope
Beyond Pluto: cold night, Oort
cloud: the outer reaches of the solar system
Probe: Voyager
1 The energy ball of atoms, rapidly expanding, energy and matter are transformed into each other; 200 million years of cooling period; gravity gathers gas, gives it energy, produces stars 11 billion years milky way: stellar big bang - supernova, produces molecular clouds, atomic nuclei Fusion, from the elements of hydrogen and helium to gradually produce oxygen, silicon, aluminum and iron - star staff; 4.5 billion years of sun: repeated collisions and explosions, coupled with the effect of gravity, produced our planet - the earth, the moon, and the Souvenirs of ancient violence; Earth cooled, oceans formed;
3.5 billion years of life: beginning to form, mass extinction, explosion; growth and death of ancient forests - coal; asteroid hitting the earth, extinction of dinosaurs, sudden extreme world changes the universe;
3.5 million years human: walking upright, making tools, using fire , domesticated animals (wolf-dog), 30,000 years of astronomy, 10,000 years of farming civilization, 6,000 years of written text: Moses, Sakyamuni, Jesus, Muhammad.
Origin of species:
atoms, molecules, DNA, proteins, evolution: we who have been selected by nature, artificial selection of others, Permian-mass extinction,
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