solar system
Post on 11-May-2015
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Presentation by
D.VijayakumarAmateur Astronomer
Life Member - Tamilnadu Astronomy Association
Email ID : vijayorion@yahoo.com
A journey to our SOLAR
SYSTEM
SOLAR NEBULA
Nearly 5 billions years ago,our Sun was formed within a cloud of gas And dust in a spiral arm of the Milky Way Galaxy.
SOLAR NEBULA
Our Solar System began forming within a concentration of Interstellar dust and hydrogen gas called a MOLECULAR CLOUD. The cloud contracted under its own gravity and Our proto-sun formed in the hot dense centre.
The remainder of the cloud formed a swirling disk called of the solar nebula.
Formation of our Solar System
Solar System
The solar system consists of the Sun, and everything bound to it by gravity.
This includes the EIGHT planet and their Moons, the Asteroids, the dwarf planets, meteoroids and comets
There are two types of planets
1. INNER PLANET2. OUTER PLANET
INNER PLANET
Inner planets are compact solid bodies with rocky surface
Inner planets are Mercury, Venus, Earth, and Mars.
OUTER PLANET
Outer planets are often called Gas Giants.
Outer planets are Jupiter, Saturn, Uranus, Neptune.
Sun
The sun is the closest star to Earth and is the centre of our Solar system.
A giant, spinning ball of very hot gas, the Sun is fueled by nuclearfusion reactions. Sun heats our world and makes life possible.
Sun orbits speed at 220 km per second, galaxy is so large that evenat this speed a single orbit takes about 225 million years.
Sun – Hydrogen atoms combine to form the atom hydrogen isotopedeuterium, The deuterium atom then combine in a fusion reaction to form helium.
Sun details
Sun Diameter : 1.4 million km
Revolution : 25 days
Distance From Earth : 92 million miles (147 million km)
Surface Temperature : 6,000˚ C
Mercury
Mercury nearest to the sun, only slightly larger than the Earth’sMoon.
Its surface is covered with Craters.
Average distance from the sun : 57,900,000 km
Mercury
MercuryPhysical & Orbital
Data
Mercury diameter : 4,878 km
Distance from the sun : 57,900,000 km
Orbital Period : 88 Earth days
Rotation : 58.65 Earth days
Tilt of Axis : 0˚
Satellite : none
VENUS
Venus a “sister” planet to the earth.
Hottest planet in the Solar system.
It’s reflective cloud cover makes it one of the brightest planet in the night sky.
It has a very thick and Poisonous Atmosphere, rich in Carbon-di-oxideCreates a strong GREENHOUSE effect causing temperature to rise as high as 480 °c
Venus
Venus land area
A radar image of the volcano Maat Mons, taken by the Magellan space craft in 1990.
VenusPhysical & Orbital Data
Diameter : 12,104 km Distance from the sun : 10.82 ( crore km)
Orbital Period : 224.7 Earth days
Rotation : 243.01 Earth days
Tilt of Axis : 177.4°
Satellite : none
Earth
Earth is our home planet, is a beautiful blue and white ball when seen from space.
It is the largest planet in the inner planet .
Earth is the only planet know to support life and to have liquid waterAt the surface.
Earth
Day and Night
Applo 18 took the picture
EarthPhysical & orbital detail
Earth diameter : 12,756 km
Distance from the sun : 149.6 million km (15 crore km )
Orbital Period : 365.26 Earth days
Rotation : 23 hr 56 min 4 sec
Tilt of Axis : 23.5°
Satellite : One
Moon
Earth's only natural satellite and the fifth largest satellite in the Solar System. The average centre-to-centre distance from the Earth to the Moon is 3,84,403 km, about thirty times the diameter of the Earth. 400 times smaller than the Sun.
The Moon makes a complete orbit around the Earth every 27.3 days is called one Lunation.
Moon
Jura Mountain
Earth's only natural satellite and the fifth largest satellite in the Solar System. The average centre-to-centre distance from the Earth to the Moon is 3,84,403 km, about thirty times the diameter of the Earth. 400 times smaller than the Sun.
The Moon makes a complete orbit around the Earth every 27.3 days is called one Lunation.
Moon
Mars
Mars is Earth’s outer neighbor, is the Forth planet from the Sun.
Mars’ bright appearance and reddish Color stand out in the nightsky. With a rocky crust and mantle and a metallic core.
It even has polar ice caps.
Mars
Phobos
Mars moon Deimos
Mars Rover
Mars polar Ice cap
MarsPhysical &Orbital Data
Mars Diameter : 6,787 km
Distance from sun : 228 million km (22.79 crore km)
Orbital Period : 689.98 Earth days
Rotation : 24 hr 37 min 23 sec
Tilt of Axis : 1.85°
Satellite : Two
Jupiter
Jupiter is the Solar System’s largest planet.
Its mainly hydrogen and helium atmosphere resembles that of our Sun.On January 7, 1610, using his Primitive telescope, astronomer Galileo Galilei saw four small “Stars” near Jupiter. He had discovered.
Jupiter
Jupiter Red spot and moon's shadow
Jupiter’s four large moon’s now called Io, Europa, Ganymede,Calisto.
Great Red Spot The Great red spot is a huge storm that has existed for at least400 years. It is very much like a hurricane on Earth. The storm rotates counter clockwise and makes a full rotation about everysix days.
Io
A volcanic plume rises over 300 kilometers above the horizon of Jupiter's moon Io
This five-frame sequence of New Horizons images captures the giant plume from Io's Tvashta volcano
The gibbous phase of Jupiter's moon Europa
Icy surface of Jupiter's moon, Europa
An image of the leading hemisphere of Ganymede seen by NASA's Galileo spacecraft.
The area of Nicholson Regio and Arbela Sulcus illustrates many of the diverse terrain types on Jupiter's moon Ganymede
JupiterPhysical & Orbital Data
Jupiter Diameter : 142,800 km
Distance from the sun : (778.6 million) 77 crore 86 lakhs km
Orbital period : 4332.71 Earth days – 12 years
Rotation : 9 hrs 50 min 30 sec
Tilt of Axis : 3.1° C
Satellite : 63 nos
Saturn
Saturn is the sixth planet from the Sun and the second largest planet in our solar system. (Jupiter is larger than Saturn.)
This planet is made up of very light gases. It is difficult to study the surface of Saturn because it has such a thick atmosphere of swirling clouds caused by strong winds. Saturn is surrounded by hundreds of rings, made up of pieces of ice , rocks and dust.
It is all the rings that make Saturn look so beautiful. Some scientists believe that the rings are made up of materials left over from when Saturn became a planet. Others think the rings are pieces of one of Saturn's moons that was torn apart. Titan is the name of the largest moon.
SaturnPhysical & Orbital Data Saturn diameter : 1,20,000 km
Distance from Sun : 143 billion km ( 143 crore km)
Orbital Period : 29.5 years
Rotation : 10 hrs 67 min
Tilt of Axis : 27°
Satellite : 60 nos
Uranus
Uranus
Uranus, the seventh planet from the sun, has its spin axis almostin the plane of its orbit about the sun.
This odd alignment is through to be the result of a collision withsome other body, possible a planet-size object, early in its history. Its bright blue-green color from methane gas in its atmosphere.
Uranus Pysical & Orbital DataUranus Diameter : 51,488 km
Distance from the sun : 2.871 billion km (143 crore km)
Orbital Period : 84 years
Rotation : 17.24 hrs (retrgrade)
Tilt of Axis : 98˚ C
Satellite : 27 known moons, faint rings
Neptune
Like Uranus, Neptune gets its bright blue coloring from methanegas in its atmosphere. Hurricane-like storms, similar to Jupiter’s great Red spot, regularlymove across Neptune’s turbulent surface.
Neptune
NeptunePhysical & Orbital Data
Neptune Diameter : 49,493 km
Distance from the sun : 4.494 billion km (449 crore km)
Orbital Period : 165 years
Rotation : 17.24 hrs
Tilt of Axis : 29.36˚
Satellite : 13 known moons, faint rings
Pluto
Pluto orbits beyond the orbit of Neptune (usually). It is much smaller than any of the official planets and now classified as a "dwarf planet". Pluto is smaller than seven of the solar system's moons (the Moon, Io, Europa, Ganymede, Callisto, Titan and Triton).
Pluto
Pluto Physical & Orbital Data
Pluto Diameter : 2,390 km
Distance from the sun : 5.869 billion km (5.87 crore km)
Orbital Period : 248 years
Tilt of Axis : 123˚ (or) 17.1˚
Satellite : three
Comets
Comet are cold clumps of rock and dusty ice that travel fromfar reaches of the Solar system to point very close to the sun.
Most comes from beyond the orbit of Neptune in an area called The kuiper belt.
When a comet nears the sun, its ice vaporizes a mixture of sandand dust is pushed away from the comet by solar winds, forming a long tail, called a coma.
Comet
Asteroids
Most Asteroids-rock remains from the formation of the Solar system-orbit the sun in the asteroids belt between Mars and Jupiter.
Here you’ll find million of asteroids ranging in size from a few hundred feat to a few hundred miles in diameter.
Asteroid
Courtesy
NASA
JPL
HST Images
ESA
Thank You
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