May 2, 2002
Alan M. MacRobert, Senior Editor
617-864-7360 x151, amacrobert@SkyandTelescope.com
Roger W. Sinnott, Senior Editor
617-864-7360 x146, rsinnott@SkyandTelescope.com
|Note to Editors/Producers: This release is accompanied by two publication-quality illustrations and an animation; see below.|
If you haven't yet seen the great planetary gathering that's unfolding in the west at dusk, the first half of May brings your best opportunity. All five naked-eye planets Mercury, Venus, Mars, Jupiter, and Saturn are well placed for viewing in the western twilight sky about an hour after sunset.
Start by looking high in the west for bright Jupiter; you can't miss it. Next find brilliant Venus down to Jupiter's lower right. The other three planets are much fainter (especially little Mars) and are gathered in Venus's general vicinity.
"If there's one date not to miss, it's May 14th," advises Alan MacRobert, a senior editor at Sky & Telescope magazine. "That's when the crescent Moon is closely paired with brilliant Venus. Just look west in twilight it'll be a dramatic sight. The other planets will emerge as darkness grows deeper."
The finale of this season's planetary convergence comes on June 3rd: a close conjunction (pairing) of brilliant Venus and Jupiter.
Descriptions of the planetary arrangement each evening for the next few weeks can be found in the article "A Rare Dance of Planets" elsewhere on this Web site.
Close gatherings of the five naked-eye planets are relatively rare. Every 20 years, we get a period a few years long within which these worlds can all gather in more or less the same part of the sky as seen from Earth's perspective. The last widely visible five-planet bunching was in February 1940. (A tight grouping occurred in May 2000 but was hidden in the Sun's glare.) Another good one won't take place until September 2040. So for many of us, this year's display represents a once-in-a-lifetime opportunity.
The twilight gathering of planets above the western skyline provides a fine "photo op" for anyone wanting a memento of the occasion. According to Dennis di Cicco, a veteran astrophotographer and senior editor at Sky & Telescope magazine, "Today's popular point-and-shoot cameras, including the new generation of digital cameras, can easily capture this celestial spectacle." Simply place your camera on a firm support such as a tripod or a windowsill, disable the flash, frame the scene in the viewfinder, and open the shutter for a few seconds. If your camera offers manual overrides, set the focus for infinity and the lens to its maximum aperture (lowest f/number). Because twilight changes rapidly, take a set of "bracketed" exposures lasting about 1, 2, 4, and 8 seconds each. At least one of them is likely to come out well.
Having a tree or building silhouetted in the foreground will make the picture's composition more interesting, di Cicco suggests and it will help during the processing of your film, since the planets create such small specks on the negative that the frame may look blank and not be printed.
Stargazers worldwide can use Sky & Telescope's Interactive Sky Chart to simulate the planetary parade as seen from their particular location. For example, click on the following link to simulate the sky as seen from Miami, Florida, at 8:50 p.m. Eastern Daylight Time on May 14th, the night the planets are bunched closest together: view sky chart.
Sky & Telescope is making the following illustrations available to the news media. Permission is granted for one-time, nonexclusive use in print and broadcast media, as long as appropriate credits (as noted in each caption) are included. Web publication must include a link to SkyandTelescope.com.
Click on each image to download a high-resolution version.
Click on the links in the next image's caption to download an animated GIF showing the shifting positions of the naked-eye planets from April through early June.