The document provides an overview of the solar system, including the sun's dominance and characteristics of each planet, from Mercury to Neptune. Each planet is classified as either terrestrial or gas giants, with specific details about their orbits, rotation, composition, and notable features. The information includes key facts such as temperature ranges, number of moons, and the unique aspects of each planet.

1. Planets
By Kalika Patil

2. Our Solar System
• The Solar System is made up of all the planets that
orbit our Sun. In addition to planets, the Solar
System also consists of moons, comets, asteroids,
minor planets, and dust and gas.
• Everything in the Solar System orbits or revolves
around the Sun. The Sun contains around 98% of
all the material in the Solar System.
• Scientists believe that the Solar System evolved
from a giant cloud of dust and gas. They believe
that this dust and gas began to collapse under the
weight of its own gravity.

3. Planets
• A planet is an astronomical object orbiting a star or
stellar remnant that
1. is massive enough to be rounded by its own
gravity,
2. is not massive enough to cause thermonuclear
fusion, and
3. has cleared its neighbouring region of
planetesimals.
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NACHOS

4. Mercury
• The planet Mercury is the closest of the planets to
the Sun. Because this planet lies so close to the
Sun, and as a result somewhat near to Earth, it is
visible to observers on Earth in the late evening or
early morning sky.
• Closest to the sun.
• Smallest planet to the solar system.
• Terrestrial Planet (solid surface
• 1 year = 88 earth days.
• 1 day = 1407 earth hours (58 earth days)
• Temperature = -173 to 427 degree celsuis
• No moons

5. Venus
• Venus is the second planet from the Sun,. It has
the longest rotation period (245 days) of any planet
in the Solar System, and, unusually, rotates in the
opposite direction to most other planets. It has no
natural satellite. It is named after the Roman
goddess of love and beauty
• It is a terrestrial planet.
• Spins backward
• Hot & deadly. Lots of volcanoes
• 1year = 224.7 Earth days
• 1 day = 5832 earth hours
• Temperature = 462 degree Celsius

6. Earth
• Earth is the third planet from the Sun, the densest
planet in the Solar System, the largest of the Solar
System's four terrestrial planets, and the only
astronomical object known to harbour life.
• It is a terrestrial planet.
• Supports life with air, water, land
• 1 year = 365 days
• 1 day = 24 earth hours
• Temperature = -87 to 57 degree Celsius
• 1 moon

7. Mars
• Mars is the fourth planet from the Sun and the
second smallest planet in the Solar System, after
Mercury. Named after the Roman god of war, it is
often referred to as the "Red Planet" because the
iron oxide prevalent on its surface gives it a
reddish appearance.
• It is a terrestrial planet.
• It is rocky, dusty and dry & have red iron in soil
• It has polar ice caps like Earth
• 1 year = 687 earth days
• 1 day = 24 earth hours , 37 mins
• Temperature = -214 to -5 degree Celsius

8. Jupiter
• Jupiter is the largest planet in the Solar System. It
is the fifth planet from the Sun. Jupiter is classified
as a gas giant, both because it is so large and due
to the fact that it is made up mostly of gas. The
other gas giants are Saturn, Uranus, and Neptune.
• It is a gas giant.
• 49 known moons
• 1 year = 12 earth years
• 1 day = 9 earth hours , 56 mins
• Temperature = -148 degree Celsius

9. Saturn
• Saturn is the sixth planet from the Sun and the
second-largest in the Solar System, after Jupiter. It
is a gas giant with an average radius about nine
times that of Earth. Although only one-eighth the
average density of Earth, with its larger volume
Saturn is just over 95 times more massive. Saturn
is named after the Roman god of agriculture; its
astronomical symbol represents the god's sickle.
• 1 year =19759 earth days
• 1 day = 10 earth hours, 39 mins
• Temperature = -178 degree Celsius
• 52 moons - latest is Titan
• 7 flat rings made of ice , rocks & dust.

10. Uranus
• Uranus is the seventh planet from the Sun. It has
the third-largest planetary radius and fourth-largest
planetary mass in the Solar System. Uranus is
similar in composition to Neptune, and both have
different bulk chemical composition from that of the
larger gas giants Jupiter and Saturn.
• 1 year = 30687 earth days (84 earth years)
• 1 day = 17 earth hours, 15 mins
• Temperature = -216 degree Celsius (very cold)
• 27 moons - largest is Titania & oberon
• It is the coldest planet
• Poles turn to the sun ( Spins in different axis)

11. Neptune
Neptune is the eighth planet from the sun. It lies
beyond the Uranus. Neptune is the second
planet which is discovered with the help of
telescope. Neptune was the first planet to be
discovered as a result of predictions. Neptune
was discovered in 1846 as a result of the effect
of its gravitational pull on Uranus. Neptune is
about the same size and mass as Uranus. It is
the last of the large planets. Neptune is mainly
made up of liquid and frozen hydrogen and
helium gases. The temperature of the surface of
Neptune is,-200o
C. No life can exist on the planet
Neptune. Neptune has 8 moons. It has also rings
around it.