This cache is part of a 1:133,700,000 scale model of the solar system. The dome on the Monroe County Courthouse in downtown Bloomington, Indiana serves as the model of the Sun, and all the planets, dwarf planets, large moons, and asteroids are all constructed to the proper size and placed at the proper distance based on that scale.
The first version of this cache was hidden by a local brewery, but then they renovated the landscaping, so it disappeared. So I archived it and hid a new version in a completely different location. That lasted about a week before disappearing, so I moved it back to the brewery parking lot once the new landscaping was completed. Then they redid the landscaping again, and so I archived the cache again. So now we're back to the second location. I hope it lasts longer than a week this time.
Venus is about twelve-thousand kilometers in diameter, which, at this scale, corresponds to roughly three and a half inches (8.9cm). Venus has the most circular orbit of all the planets, orbiting at 107 to 109 million kilometers from the sun, so this model would have to have been placed about half a mile (0.8km) from the Courthouse, give or take only 25 feet (8m). That's not a very big margin, so I fudged things a bit and put it a few dozen feet further away. I may be a pedant, but I have limits.
Venus is the second planet from the Sun, named after the roman goddess of love and beauty. Because it is closer to the Sun than the Earth, it is only ever visible in the hours just after sunset or before sunrise. For a while, Venus was thought of as two different stars: the Morning Star and the Evening Star.
Other than the Moon and the Sun, Venus is the brightest object in our sky. This is partly because it is often close to us, but also because it is very white, due to the thick clouds of sulfuric acid that completely cover the surface. In the visible spectrum, there are very few distinguishing features to be seen, even in the clouds, which is why this model has such a boring paint job.
Even though Venus is similar to Earth in size, its extremely dense atmosphere makes exploring the planet very difficult. The air pressure on the surface of Venus is comparable to the pressure at a depth of a kilometer in Earth's oceans. On top of that, the greenhouse effect has raised the temperature at ground-level to about 460°C / 860°F. That's even hotter than the surface of Mercury. Even the upper atmosphere, which is considerably cooler and less dense, is quite hostile, with clouds full of sulphuric acid and absurdly powerful winds.
Humanity's first efforts to explore the solar system were directed at Venus, due to its prominence in the night sky and to its proximity and apparent similarity to Earth. The difficult environment completely destroyed the first few human probes before they reach the surface. Eventually, we were able to get a few on the ground and get some idea of what the ground looks like. It's mostly rock.
These days, humans are much more interested in exploring Mars, which is a lot easier to land on and study.