On June 9, Venus and Jupiter appeared just 1.6 degrees apart in the western sky during twilight — about three times the width of a full moon, and close enough to fit both planets inside a standard pair of binoculars. The nights on either side looked nearly identical, making it one of the most forgiving skywatching events of the summer.
To put that distance in perspective: hold up a single index finger at arm's length. That was the gap. Both planets were visible to the naked eye, no gear required. The best viewing window was roughly 45 minutes to two hours after sunset, with a clear view of the western horizon giving the best results.
Here's the part that messes with your head a little: the whole thing was an optical illusion. Venus and Jupiter aren't actually anywhere near each other. Venus sits about 1.2 astronomical units from Earth; Jupiter is about six. One AU equals the distance between Earth and the sun, which means Jupiter is five times farther away than it looked relative to Venus. The solar system is just doing what it does, and we happened to be standing in a spot where the geometry looked impressive.
The reason they converged comes down to orbital speed. Venus laps the sun in about 225 days. Earth takes 365. Jupiter takes nearly 12 years. Earth was pulling away from Jupiter fast enough that the gas giant has been slowly sinking in the evening sky, and will disappear into the sun's glare entirely by July 29. Venus, meanwhile, is gaining on Earth, rising higher and brighter as summer goes on. The two planets were heading in opposite directions, and June 9 was when their paths in the sky crossed.
Venus also had the brightness advantage by a significant margin — 7.5 times brighter than Jupiter during the conjunction, shining at -3.9 magnitude compared to Jupiter's -1.7. The reason comes down to cloud cover: Venus is wrapped in thick layers that reflect sunlight far more efficiently than Jupiter's atmosphere.
For those who caught it with binoculars or a backyard telescope, Jupiter's four large Galilean moons — Io, Europa, Ganymede, and Callisto — appeared as faint dots flanking the planet. A decent camera could get both planets in a single frame.
Missed it? The next one on the calendar is November 15, when Jupiter and Mars will close to within 1.2 degrees of each other before sunrise.