[Tarpon]

Plenty of news stories today about Venus is Earth's twin. Nothing could be further from the truth. The major difference between Earth and Venus is Venus has no magnetic field, which means no magnetosphere. With no magnetosphere, Venus' atmosphere is open to literally being blown away by the sun. No global warming, no greenhouse gas, no similarity to Earth.

This science update from ESA says as much. News stories, you are on your own, but suggest Freepers stick with real science.

Why Venus' atmosphere is mostly composed of CO2 has nothing to do with acient SUVs or runaway greenhouse effects.

Read the full article for more.

[sinanju]

No plate tectonics neither

[Buggman]

Okay, now let's extrapolate backwards: Venus' atmosphere today is (IIRC) already thicker than Earth's even with the solar wind damage, so what was it like, say, a few million years ago?

Either Venus was once a gas giant, or something's not adding up here.

[pierrem15]

You mean it's mainly CO2 because the lighter gases have been blown away by the solar wind?

So I guess the magnetosphere protects the airheads in the MSM, too.

[ml/nj]

throughout the planet’s four-thousand million-year history

Velikovsky says it's of recent origin dating back to the time of Exodus. (c. 1500 BC)

ML/NJ

[CaptRon]

Does “four-thousand million” equal 4 billion? Odd way to state it. Of course, I'm no mathematician.

[3niner]

Venus is quite a bit warmer than the Earth, but then it’s much closer to the Sun, and its atmosphere contains about 200,000 times as much CO2, as Earth’s atmosphere.

[damondonion]

The Sun has probably been stripping away the Venus’ atmosphere throughout the planet’s four-thousand million-year history...

Simplest and most obvious explanation for what we see on Venus is still Velikovsky's, i.e. the place is basically a new planet. V may or may not have had the rough idea of dating right but the idea of that much heat being produced by any sort of a greenhouse effect is basically idiotic, particularly when probes indicated that sunlight didn't reach the surface at all; i.e. that it was pitch black in the middle cloud layers and that the light they saw at the surface was locally generated by come combination of heat and chemical reactions.

[steelyourfaith]

~~ AGW™ ping~~