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Venus meets Jupiter
On February 1, the solar system's brightest planets appear closest
together.
Francis Reddy
Jupiter joined Venus (left) for an early morning rendezvous
in November 2004. Here, the pair gleams over Bursa and Uludag, Turkey, before
dawn. A similar sight awaits early risers throughout late January and early
February. Tunç Tezel [View Larger Image]Updated January 22, 2008
Venus, the planet nearest to Earth, and Jupiter, the solar
system's biggest world, are headed for a morning meeting. As the brightest
planets in the sky, the pair makes a conspicuous sight in eastern twilight.
During the next week, watch Jupiter edge ever closer to
Venus. As the planets draw together, they'll begin to resemble a pair of
celestial headlights - an appropriate comparison for an event that graces the
morning commute.
The planetary dance culminates February 1, when the two
worlds lie a little more than one Moon-width apart. That's so close, observers
with telescopes can view both planets at the same time by using low-power,
wide-field eyepieces. What's more, Jupiter's four biggest moons will be on
display as well. Observers can take in six worlds with one view.
Although the two planets seem to be in danger of colliding,
appearances can be deceiving. On February 1, Jupiter lies 562 million miles
(904 million kilometers) away. That's more than 4.5 times farther than Venus,
which is 124 million miles (200 million km) distant the same morning.
Even so, a telescope will show Jupiter's 33" width is nearly
3 times the size of Venus' disk. The reason, of course, is that giant Jupiter,
the solar system's largest planet, is 12 times Venus' size.
How you can see it
From January 25 and February 1, look low in the southeast in
the hour before dawn. The two brightest star-like objects are Venus and
Jupiter. Venus is the brighter of the two.
Venus and Jupiter make their closest approach to each other
February 1. That morning, use a telescope and a low-power eyepiece to take in
both planets - and all four of Jupiter's biggest moons as well. This
illustration shows the conjunction as it will appear in a low-power telescope;
insets show the planets' relative sizes and illuminations. Astronomy: Roen
Kelly
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