Saturday, June 30, 2007

Don't miss Venus/Saturn conjunction!



SPACE. COM:

Evening skywatchers are still enjoying the sight of at least three of the five bright naked-eye planets: Venus and Saturn in the western sky and Jupiter, low in the southeast. And if you really stay up late – say after 1:30 a.m. local daylight time – you can add a fourth planet, Mars, emerging from above the eastern horizon and which will become increasingly prominent during the summer and fall as it slowly approaches the Earth.
But this weekend really belongs to Venus and Saturn, both easily visible in the western sky just as darkness falls.

The two planets will put on a show on both Saturday and Sunday evenings when they will appear within 0.8-degrees of each other.
The actual moment of closest approach will occur at 09:33 Universal Time on Sunday, when they will appear to close to within 0.66-degrees of each other. How close is that? The apparent width of the Moon is equal to one-half degree, and the width of your fist held at arm's length is roughly equal to 10 degrees. Unfortunately, the two planets will be below the horizon at that hour for North America, while Europe will be in daylight. It will be around sundown for Japan and Australia, however, where a good view of the closest approach between the two planets can be seen.


If the weather is favorable in your location and you have access to binoculars or a telescope and enjoy any interest whatsoever in the wonders of the night sky, you should check out this awesome sight. These two planets, both visible in the same field of view.Even with my poor equipment, we could see Saturn's rings and Venus's brilliant crescent.



By Tuesday, July 3rd, the gap between the two planets will have widened noticeably, but now they'll be side-by-side, with Venus on the left, Saturn on the right.
Specific observing details for both planets for the coming weeks:
Venus
Venus has been a prominent evening object since January, will finally relinquish the title of "Evening Star" by the start of August, so July will be your last full month to enjoy it during convenient evening hours before it makes the transition to the morning sky.


On the 8th, Venus attains its greatest brilliancy and blazes at an eye-popping magnitude of -4.5. But compared to just a week earlier it will be noticeably lower in the sky at sundown and setting just 2 hours later. On the evening of the 12th, Venus will pass less than 2-degrees below Regulus, the brightest star in the constellation Leo; you may, however, need binoculars to see the star.
By the end of July, Venus will be setting only 45 minutes after sunset; you'll need a clear and unobstructed horizon to spot it. A few more days into August and it will finally be gone from our evening sky. It will sweep between Earth and the Sun (inferior conjunction) on Aug. 18, then, just a week later it will emerge into view as a morning object, rising in the east about 45 minutes before sunrise.

Saturn
Saturn begins July hovering just above and to the right of dazzling Venus, and in fact, follows Venus' plunge into the sunset fires as the month progresses.
Saturn is shining at a very respectable magnitude of +0.6, but unfortunately this pales to the brilliance of Venus. Indeed, Saturn only appears one-hundredth as bright!

PHOTOS FROM NASA

3 comments:

Rosemary Welch said...

Pretty cool! :)

Michael said...

Neat. Now I know just what bright stars I have been looking at all year.

Thanks for posting.

blank said...

I should try to capture a photographof them.