astrophysics universe. the solar system the sun mass: 1.99 x 10 30 kg radius:6.96 x 10 8 m ...
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ASTROPHYSICS
UNIVERSE
ASTROPHYSICS
UNIVERSE
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The Solar SystemThe Solar System
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The SunThe Sun
Mass: 1.99 x 1030 kg
Radius:6.96 x 108 m
Surface temperature: 5800 K
Mass: 1.99 x 1030 kg
Radius:6.96 x 108 m
Surface temperature: 5800 K
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Planet Picture Distance to the Sun (km)
Radius (km) Orbital period
around its axis
Orbital period
Surface day temp
(ºC)
Density (water=1
)
Satellites
Mercury
58 million 4 878 km 59 days 88 days 167 5,43 0
Venus 108 million 12 104 km -243 days 225 days 464 5,24 0
Earth 149,6 million 12 756 km 23, 93 h 365,2 days 15 5,52 1
Mars 228 million 6 794 km 24h 37min 687 days -65 3,04 2
Jupiter 778 million 142 800 km 9h 50min 30s
12 years -110 1,32 +63
Saturn 1 427 million 120 000 km 10h 14min 29,5 years -140 0,69 +56
Uranus 2 870 million 51 800 km 16h 18min 84 years -195 1,27 27
Neptune
4 497 million 49 500 km 15h 48min 164 years -200 1,77 13
Pluto 5 900 million 2 400 km 6 days 248 years -225 2 1
Planets DataPlanets Data
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Mercury and VenusMercury and Venus
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Earth and MoonEarth and Moon
Mariner 10
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Earth and MoonEarth and Moon
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MarsMars
Spirit Rover: Mars’ West Valley
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MarsMars
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MarsMars
Viking: Martian Face
ESA’s Mars Express: Cydonia Region
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Asteroid BeltAsteroid BeltCeres (480km): it was the first asteroid to be seen. Now it’s a dwarf planet.
Mathilde (52km)
Eros (13x13x33km
)
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JupiterJupiter
Jupiter and its moons: Io, Europa, Ganymede and Callisto
Approximate size comparison of Earth and Jupiter
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SaturnSaturn
A rough comparison of the sizes of Saturn and Earth
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UranusUranus
Size comparison of Earth and Uranus
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NeptuneNeptune
Size comparison of Neptune and Earth.
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GalaxiesGalaxies
A galaxy is a collection of a very large number of stars mutually attracting each other through the gravitational force and staying together. The number of stars varies between a few million and hundreds of billions. There approximately 100 billion galaxies in the observable universe.
There are three types of galaxies:
- Spiral (Milky Way)
- Elliptical (M49)
- Irregular (Magellanic Clouds)
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Spiral GalaxiesSpiral Galaxies
Spiral galaxies consist of a rotating disk of stars and interstellar medium, along with a central bulge of generally older stars. Extending outward from the bulge are relatively bright arms.
Milky Way
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Spiral GalaxiesSpiral Galaxies
Andromeda
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Spiral GalaxiesSpiral Galaxies
Sombrero Galaxy
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Elliptical GalaxiesElliptical Galaxies
M49
Elliptical cross-section and no spiral arms.They range in shape from nearly spherical to highly flattened ellipsoids and in size from hundreds of millions to over one trillion stars.In the outer regions, many stars are grouped into globular clusters.
ESO 325-G004
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Irregular GalaxiesIrregular Galaxies
Irregular galaxies have no specific structure. The Large and Small Magellanic Clouds, the nearest galaxies, are an example of irregular galaxies.
Small Magellanic Cloud Hoag's Object, a ring galaxy.
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ConstellationsConstellations
A group of stars in a recognizable pattern that appear to be near each other in space.
Orion
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PolarisPolaris
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NebulaeNebulae
Nebula is an interstellar cloud of dust, hydrogen gas and plasma. It is the first stage of a star's cycle but it can also refer to the remains of a dying star (planetary nebula).
Originally nebula was a general name for any extended astronomical object, including galaxies beyond the Milky Way (some examples of the older usage survive; for example, the Andromeda Galaxy was referred to as the Andromeda Nebula before galaxies were discovered by Edwin Hubble).
Nebulae often form star-forming regions, such as in the Eagle Nebula.
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NebulaeNebulae
Eagle Nebula and the Cone nebula:
star-forming regions
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Cat’s Eye NebulaCat’s Eye Nebula
Planetary nebulae are nebulae that form from the gaseous shells that are ejected from low-mass giant stars when they transform into white dwarfs.
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Eskimo nebulaEskimo nebula
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SupernovasSupernovas
Eta Carinae Crab Nebula