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NOTES: Venus 0.95 DEarth Surface Temp. = 900 OF, Greenhouse effect. Atm. Pressure = 90 x Earth's PowerPoint PPT Presentation


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NOTES: Venus 0.95 DEarth Surface Temp. = 900 OF, Greenhouse effect. Atm. Pressure = 90 x Earth's Atmosphere : 96% CO2, 3.5% Nitrogen. Clouds of sulfuric acid, sulfur dioxide, sulfur, indicating live volcanism? 2. Rotation : siderial--243 days, solar–117 days.

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NOTES: Venus 0.95 DEarth Surface Temp. = 900 OF, Greenhouse effect. Atm. Pressure = 90 x Earth's

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Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

  • NOTES: Venus

  • 0.95 DEarth

  • Surface Temp. = 900 OF, Greenhouse effect.

  • Atm. Pressure = 90 x Earth's

  • Atmosphere: 96% CO2, 3.5% Nitrogen. Clouds of sulfuric acid, sulfur dioxide,

  • sulfur, indicating live volcanism?

  • 2. Rotation: siderial--243 days, solar–117 days.

  • 3. Surface Features: 27% Lowlands, 65% rolling plains, 8% highlands.

  • Cones, faults, craters, multiple lava flows.

  • A. Ishtar Terra--US sized lava-filled basin--highlands

  • B. Maxwell Montez--Everest's height--100 km Diam.

  • Cleopatra, crater on it's flank.

  • C. White magnetite (?) above 2.5 km.

  • D. Surface--young to 800 million years--crater cycle.

  • E. Surface too cracked to form plates, but molten core

  • distorts surface with mantle convective flow.

  • F. Atmosphere rotates much faster than surface

  • creating wind features--impact ejected to west, streaks near ridges.

  • G. 100,000 small 'shield' volcanos--clusters due to hot spots,

  • volcanic material near surface. No plumes show--high pressure.

  • H. Lava Channels--one 7,000 (!) Km long

  • I. Calderas over 100 km in diameter.

  • 4. Visiting Spacecraft: 1962-1975-Three Mariners (USA) rudimentary mapping.

  • 1962--Venera--Soviet surface landing.

  • 1989-90--Magellan (USA)--accurate radar maps.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

As the morning star (rising before sun, and Goddess of love.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Venus transit 2004 (conjunct sun)


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Venus

0.95 Diamearth

Surface Temp. = 900 OF, Greenhouse effect.

Atm. Pressure = 90 x Earth's

In UV

Radar map


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Atmosphere: 96% CO2, 3.5% Nitrogen. Clouds of sulfuric acid, sulfur dioxide,

sulfur, indicating live volcanism?


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Rotation: sidereal day--243 Earth days, solar day–117 days.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

3. Surface Features: 27% Lowlands, 65% rolling plains,

8% highlands. No oceans—way too hot!

Cones, faults, craters, multiple lava flows.

A. Ishtar Terra--US sized lava-filled basin—highlands—lower right.

B. Aphrodite—reflective volcanic cones--top.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Carl Sagan realized Venus was warmed

by what he called a ‘greenhouse effect’—

almost all carbon dioxide atmosphere  very hot.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

B. Maxwell Montez--Everest's height--100 km Diam.

Cleopatra, crater on it's flank


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Reflective magnetite on volcanic peaks above 2.5 km.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Surface--young to 800 million years--crater cycle.

Every few million years, Venus may blow her top.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Atmosphere rotates much faster than surface

creating wind features--impact ejected to west, streaks near ridges.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

100,000 small 'shield' volcanos--clusters due to hot spots, volcanic material near surface. No plumes show

--high pressure


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Lava Channels--one 7,000 (!) km

Calderas over 100 km in diameter.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Visiting Spacecraft: 1962--Venera--Soviet surface landing.

1962-1975-Three Mariners (USA) rudimentary mapping.

2005now—Venus Express (Europe).


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

1989-90--Magellan (USA)--accurate radar maps.


Notes venus 0 95 dearth surface temp 900 of greenhouse effect atm pressure 90 x earth s

Venus Express—2005-now.

Orbiter put up by European Space Agency (ESA).

Attempt to learn details of Venus’ atmosphere and movement,

unveil current volcanism and cause of super-rotation – the

'mismatch' in rotation speeds between the cloud tops

and the planet surface.


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