VENUS

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VENUS
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IMPORTANT FACTS

• With a few exceptions, the surface features on
  Venus are named for female figures. It is a
  terrestrial planet terrestrial is derived from
  the Latin word terra meaning earth. Venus is
  the second planet from the Sun and is the sixth
  largest. It is the brightest object in the sky
  after the Sun and our Moon.

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IMPORTANT FACTS CONT

• Earth and Venus are often called the sister
  planets because of the many similarities they
  share such as their closeness in size and mass.

• It is the closest planet to Earth but because it
  is shrouded in highly reflective clouds, the
  process of finding out more about the planet is
  made difficult.

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Venus Earth Unit of measure
Mass 5.37 6.58 x E 21 tons
Diameter 7521 7926 miles
Density 327 344 lbs/ft 3
Gravity 29.1 32.1 ft/s 2
Escape Velocity 6.4 7 miles/s
Rotation Period -5832.5 23.9 hours
Length of Day 2802 24 hours
Distance from Sun 67.2 93 Million miles
Orbital Period 224.7 365.2 Earth days
Axial Tilt 177.4 23.5 degrees
  867 59 degrees Fahrenheit
Mean Temperature 464 15 degrees Celsius
  737 288 Kelvin
Surface Pressure 90 1  
Number of Moons 0 1  
Ring System? No No  
Global Magnetic Field? No Yes  
VENUS COMPARED TO EARTH
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WHY PEOPLE CANT LIVE ON VENUS

• Venus has an atmosphere that is greatly different
  to that on Earth. Venus has temperatures that are
  constantly over 900 degrees Fahrenheit, clouds
  that are composed mostly of Sulfuric acid
  (H2SO4), and a high concentration of Carbon
  Dioxide in its atmosphere, which adds to the
  reasons why no life is thought to exist on the
  planet. Venus is not a planet that humans could
  survive on.

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ADDITIONAL FACTS

• The Venusian topography consists of vast plains
  covered by lava flows with mountain or highland
  regions deformed by geological activity. There
  are two major features on Venus, the first is
  Maxwell Montes, which is the highest peak on
  Venus.

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ADDITIONAL FACTS CONT

• The second is an area of highlands (the Aphrodite
  Terra) which extend almost half way around the
  equator. This area is about twice as large as the
  Northern one and is much rougher. Spacecraft have
  provided some evidence that there may be active
  volcanoes on the planet, but Venus it thought to
  have only one plate beneath its surface.

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VENUSS AXIS

• One major fact about Venus that makes it stand
  apart from the other planets is that it rotates
  around its axis the opposite way. If you were to
  look down at the plane of the solar system from
  its 'north pole' you would see the planets
  orbiting the Sun counter clockwise, and rotating
  on their axis counterclockwise. Except for Venus.

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VENUS AND URANUS

• Venus would be rotating clockwise as it orbited
  the Sun counterclockwise. The only other planet
  that is an exception to this rule is Uranus. The
  axis of Uranus is inclined so far towards the
  plane of the solar system that it almost rolls on
  its side as it orbits the Sun.

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THE DIRECTION OF VENUS

• It is unknown exactly why Venus rotates the
  opposite way from other planets, but currently,
  the reason is believed to be that an event
  occurred while Venus was being formed that
  changed the direction of its rotation.

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VENUSS SPIN

• The evidence of craters on the surface of Venus
  suggests that a large body of material could have
  collided with the planet. Rather than the
  material forming another separate body, it is
  believed that it may have been absorbed by Venus.
  The addition of the mass and kinetic energy would
  have resulted in the new spin that we see Venus
  has now.

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MAGNETIC FIELD

• The absence of a magnetic field around Venus
  indicates that either Venus has not got a liquid
  core or does not rotate fast enough. Venus
  rotates on its axis very slowly compared to the
  speed the Earth rotates.

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OBSERVATIONS OF THE LANDINGS ON VENUS

• There are many spacecraft that have made
  observations of and/or landed on Venus. Here are
  a few of them
• 1970s A series of soviet spacecraft landed on
  Venus and sent back photographs.
• 1970 Soviet Venera 7 spacecraft dropped
  through the atmosphere of Venus, 23 minutes of
  data were sent back to Earth from the surface
  before it succumbed to the high temperatures and
  pressure of the Venus atmosphere.

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CONT

• 1972 Soviet Venera 8 spacecraft survived on
  the surface of Venus for 50 minutes.
• The Galileo spacecraft and the Hubble space
  telescope have observed Venuss clouds and
  followed changes in them.
• 1990-1993 NASAs Pioneer Venus, Venera 15/16
  and Magellan were in orbit around Venus, making
  observations of the topography of the surface.

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SOURCES

• On the Web
• www.solarviews.com
• http//seds/lpl/arizona.edu
• http//nssdc.gsfc.nasa.gov
• Books
• The Cosmos Astronomy in the New Millennium (Jay
  M. Pasachoff and Alex Filipenko).

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THE END!!! KATHERINE AND JASMINE THE PLANET VENUS
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