![]() ![]() What are the hottest and coldest planets?ġ) The planets nearest to the Sun are much too hot to live on.Į.g. Pluto has once been considered the ninth planet of the Solar system, the outermost (furthest) from the solar system. But it is just a dwarf planet. Pluto is about the same size as mercury. It has 3 moons. It is the forth largest planet in the solar system. Neptune has 13 moons. Neptune is the eighth planet from the Sun. It is the third largest planet in the solar system. Uranus is the seventh planet from the Sun. Saturn is the sixth planet from the Sun. It is the second largest planet in the solar system. Saturn has few rings around it, and this is the special feature of Saturn. Saturn has 47 moons. It is the largest planet in the solar system. Jupiter has at least 63 moons. Jupiter is the fifth planet from the Sun. Mars has got the highest known mountain in the solar system called Olympus Mountain. The red areas which we can see in the Mars are cold, sand less, rocky deserts. Mars is the easiest planet to see from the Earth. It is also called the ‘Red Planet’, because it appears fiery red in the night sky. Mars is the forth planet from the Sun. It has two tiny moons. Earth is the only planet which has been discovered up to now, where life can exist. It’s the third planet from the Sun. It has only one moon. Venus is the second planet from the Sun. It is about the same size as Earth and easy to see from the Earth. Venus is also called the ‘Morning star’ when it appears in the east at sunrise, and it is also called the ‘Evening star’ when it appears in the west at sunset.Įarth is our planet. It is the smallest and the fastest planet in the solar system. Mercury is the nearest planet to the Sun. ![]() How many planets are there in our solar system?Įight planets The solar system and its eight planets What does the Sun provide for the rest of the solar system?Ī planet is an object in space that goes around the Sun. The planets orbit on the ecliptic plane as they move around the Sun.Our Sun is a star which is a hot ball of burning gases Orbits are usually elliptical and not perfect circles. The planets of the Solar System orbit the Sun while the Moon orbits the Earth. Orbit: An orbit is a path an object takes around a central point. Mars has two very small moons while Jupiter’s Ganymede is the largest moon in the Solar System and almost three times larger than our moon. Moon: A moon is a large natural satellite that orbits a planet. The energy we get from the Sun comes in the form of visible light and many forms of electromagnetic radiation. ![]() Most of the energy on planets comes from the closest star. Those reactions create a giant ball of plasma that gives off enormous amounts of energy. Star: Stars are large astronomical bodies of gases that are ignited by fusion reactions. The boundary or shell around the entire Solar System is located where the solar winds cannot stop the push of stellar winds from neighboring stars. Eventually, those winds start to slow and lose strength as they get further from the Sun. The Sun constantly gives off solar winds. Heliopause: The heliopause the outer boundary of the Solar System. If the heliosphere is like a balloon that surrounds us, the heliopause is the surface of that balloon. The heliosphere surrounds all of the pieces of the Solar System, protecting us from the interstellar environments. Heliosphere: The heliosphere is the region around the Sun where solar winds push against the stellar winds from other stars.
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