When will the next probe land on Venus?
I have seen enough Mars now. Venus has been skipped so long, that it even dates back to the 70s a last probe landed there. I know it's a tough place, but if are able to send a submarine into the Marianne Trench, where the pressure is more than a 1,000 bar, then surely the 92 bar atmosphere on Venus must be no...
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answers:
Sciencenut say: Vacuum tube electronics could function indefinitely at Venusian temperatures and pressures. And Venus has an Earthlike habitable zone at ~1 bar atmosphere and 70sF temperatures, that exists some 120,000 feet above the surface, and well above the sulfuric acid clouds/rain. A balloon mission has been proposed for visiting this zone. Maybe someday it will happen.
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CarolOklaNola say: The electronics on all the Veneras melted within hours is a major reason. Venus has sulfuric acid rain. When you figure out how to keep electronics from burning out with 96 atmospheres of pressure at 800 degrees F, hot enough to melt lead, and not corroding, get hired by NASA or get a NASA internship while you are still in engineering college, or JPL.

Or major in geology or geophysics like I did and learn how to read a phase diagram.
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ANDRE L say: Submarines are *heavy*: This is not a trait you want in any kind of spacecraft, so the lander has to be relatively small and light to fly into space. Bigger payloads require bigger rockets, which means much bigger budgets.

And, there's not as much to learn about Venus' surface, as the temperature and pressure combo make it far more uniform in it's surface conditions than one finds on Mars.
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Davros say: Venus is hard.
When the money is short, you aren't as keen to do hard.
And none of the space agencies have been rolling in money lately.

Venus was last visited by a balloon probe and lander in 1985 with the Soviet Vega mission so although it's not as long ago as you thought, it is high time someone tried again.

The odd lander/rover concept has drifted out of ESA and NASA from time to time but they've always been passed up for other projects. Both are pretty fixated on solar system bodies where life may be found.
Roscosmos is interested in it's VENERA-D project which is essentially a reactivation of the old Soviet Venera program but using modern tech inside the provenly robust old Soviet shells. It will put landers back on Venusian soil, however the first of these is not scheduled any sooner than a decade from now.
I think India has shown some interest in some sort of limited orbiter/lander mission but there's not much to go on at present.
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