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  • Rapt in Awe

    My Journey through the Astronomical Year

    Think of this as a "companion text" to this, the main web site. Not required reading, butI hope you'll find it interesting and helpful.

All square on a 2012 July morning with Jupiter, Venus, the Moon and Aldebaran

That is, all will be square in the morning sky  July 15, 2012 and in the evening sky July 24, 2012 – two dates to keep in mind this month. However, Mercury puts on one of its now-you-see-it, now-you-don’t shows the first week of the month in the west and all – Venus and Jupiter flirt with the gorgeous star clusters – the Hyades and Pleiades – in the morning sky.  Here was the scene from  my driveway this morning, July 1, 2012 – typical of the whole month and quite dazzling!

I snapped this about 4 am on July 1, 2012 looking east from 42* N latitude. That’s Jupiter at about magnitude -2 on top, and Venus at -4.4 on the bottom. Aldebaran was still hidden by the trees and my skies were too murky – and twilight already too advanced – to pick up the Pleiades easily, though scanning this area with binoculars revealed them and the Hyades. (Click photo for much larger image.)

Meanwhile, over in the west you still have a chance to catch “fleeting” – make that “fleeing” – Mercury. Here’s where to find it.

At magnitude .6 Mercury is significantly brighter than the other stars, although this image makes it seem less. Use binoculars to find it – though you should be able to see it with your naked eye. Click image for a much larger view. (Prepared from Starry nights Pro screen shot.)

OK – about  the “all square” business

It’s really not a square, but it should be a pretty rectangle that will vary a bit depending on just where you are located and exactly when you look. On the morning of  July 15 the eastern sky should look something like this – at least for those in mid-Northern latitudes. With an unobstructed horizon and clear skies the best view will be about two hours before sunrise. After that it becomes a race – planets and stars all climbs higher and thus are easier to see as time goes by – but, of course, the skies also get lighter as summer twilight starts early.

Click image for a much larger view. (Prepared from Starry nights Pro screen shot.)


In fact, all month Jupiter and Venus turn up the dazzle in the early morning sky, playing in the general vicinity of  the Pleiades and the Hyades. An unobstructed eastern horizon helps, as do binoculars if you want to get a good look at the two star clusters even in twilight.  By the end of the month Jupiter will be in the Hyades and Venus will have dropped quite a bit lower – yet the whole star show will be significantly higher at the same hour. Fun to catch it several times to observe the changing dynamics of our solar system playing against the backdrop of the rest of the universe.

And in the evening sky

The second “square” feels a bit like a mirror image. I don’t think it will be as dazzling because the planets involved simply aren’t as bright  and the Moon will be significantly brighter. Still, this one takes place in the early evening of July 24, 2012 and involves Saturn, brightest at magnitude .77, Mars at magnitude 1, Spica at almost the exact same brightness as Mars, and a 6-day-old Moon.

Click image for a much larger view. (Prepared from Starry nights Pro screen shot.)




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