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Bellwork

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Bellwork What is the force that pulls the planets towards the sun? What is the force that wants the planets to keep in a forward motion in a straight line? – PowerPoint PPT presentation

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Date added: 2 October 2019
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Title: Bellwork


1
  • Bellwork
  • What is the force that pulls the planets towards
    the sun?
  • What is the force that wants the planets to keep
    in a forward motion in a straight line?
  • How many planets do we have now?
  • Give another name for the inner planets. Give
    another name for the outer planets.

2
In your Table of Contents
  • Add Mercury and Venus Notes

3
Mercury
  • Closest to the sun
  • No moons
  • Extremely hot temperatures on one side and
    extremely cold temperatures on the other.
  • Now the smallest planet in our solar system

4
Mercury
  • Physically, Mercury is similar in appearance to
    our moon as it is heavily cratered.
  • Mercury has a rocky body like the Earth, but its
    atmosphere is very thin or weak.
  • Mercury has been visited by only one spacecraft,
    Mariner 10.

First fly-by was on March 29, 1974. Many photos
were taken and Mariner 10s infrared radiometer
was able to take measurements of the gases in
Mercurys atmosphere.
5
3 Mercurys 1 Earth
6
The first orbital path from the sun.
Mercurys Orbit
7
Mercury
  • 3.2 light-minutes
  • 58 days, 16 hours
  • 88 days
  • 4,879 km
  • -173 to 427C
  • 38 of Earths
  • Distance from sun
  • Period of rotation
  • Period of revolution
  • Diameter
  • Surface temperature
  • Surface gravity

8
VENUS
  • Second planet from the sun
  • Rotates in the opposite direction than earth
    (Venusretrograde)
  • Venus has no moons
  • Is the hottest planet

9
Earths Twin?
  • In many ways, Venus is like Earths twin.
  • They have about the same size, mass, and density.
  • BUTVenus rotates in a different direction so
    the sun rises in the west and sets in the east.
    (Retrograde rotation)

http//www.cosmos4kids.com/extras/dtop_solsyst/ven
us_580.jpg
10
Venus
  • Has the most dense atmosphere than any of the
    terrestrial planets
  • Mainly consists of carbon dioxide but also some
    deadly acids
  • The carbon dioxide traps thermal energy causing a
    greenhouse effect-causing the temperature to be
    so high
  • Average temperature 464C
  • Venus has the hottest surface of any other planet
    in the solar system!

11
Second orbital path
Venus is Orbit
12
VENUS
  • Distance from the sun
  • Period of rotation
  • Period of revolution
  • Diameter
  • Density
  • Surface Temperature
  • Surface gravity
  • 6.0 light-minutes
  • 243 days (retrograde)
  • 224 days, 17 hours
  • 12,104 km
  • 5.24 g/cm3
  • 464 C
  • 91 of Earths

13
Magellan May 4, 1989
Venus
  • Venus is the brightest object in the sky after
    the Sun and the Moon, and sometimes looks like a
    bright star in the morning or evening sky. We
    can't see the surface of the planet because it
    has a very thick atmosphere filled with clouds
    that strongly reflect sunlight.
  • Nonetheless, space missions sent to Venus have
    managed to land on and photograph the surface
    while the Magellan spacecraft mapped the surface
    of the planet from above.
  • These maps reveal a surface covered with craters,
    over 1600 major volcanoes, mountains, large
    highland terrains, and vast lava plains.

14
  • http//www.sciencechannel.com/video-topics/space-v
    ideos/mercury.htm (space school)
  • Add a fact about Mercury and Venus to your
    Planetary Placement.
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