Venus is apparently so bright this month that it’s casting visible shadows. Now that’s cool! Unfortunately, while I can see Venus perfectly well, there’s way too much light around to see anything resembling a Venusian shadow. I don’t think I’ll have a chance to drive out into the desert by sunset in the next few days.
Category: Space
The Moon and Venus, sitting in a tree
This view of the Moon and Venus was taken from our apartment balcony earlier this evening.
I also took a picture yesterday, from the top of a parking structure near John Wayne Airport (we went to a show at UCI later that evening.) You can see the red trail an airplane left as it crossed the frame:
Having seen that pairing last night, I knew I had to be ready to catch it today! I figured the Moon would be a lot closer, but I hadn’t expected it to actually pass Venus tonight. It really gives you an idea of how far the Moon moves in 24 hours. (or, in this case, roughly 23 hours, since yesterday’s picture was taken at 6:00 and today’s was taken at 5:10).
To be honest, I wasn’t actually certain it was Venus. It was my first thought, because of the brightness and the color, but I kept thinking it was too far from the sun. I kept trying to convince myself it was Jupiter or maybe Saturn (it wasn’t red enough for Mars, and besides, I’d seen Mars on the other side of the sky the night before). When I looked it up and realized it was Venus, I started remembering my days in high school when I would walk to school for a 7:00am “zero period” class. In winter it would sometimes be just dark enough when I left to see the planets and the brightest stars. I would keep my eye on Venus as the sky brightened, trying to see how late I could still see it by knowing exactly where to look.
That Belt of Venus Thing
About a month ago I posted about noticing the Belt of Venus—the red band that circles the entire horizon just after sunset—and the Earth’s shadow on the sky. I snapped this picture on the drive home this evening. This is looking east, away from the setting sun.
If you look at the right edge of the picture, behind the silhouette of the tree, you can just see the red band fading into the dark gray of the Earth’s shadow.
(And to think, I almost brought the good camera with me this morning… Update: It turns out that I did bring it, and just didn’t realize it was there. Oh, well.)
Global Warming vs. Ozone Hole
A quick question for people who discount the idea that global warming could be caused, in part, by human activities on the basis that we can’t possibly impact the climate as much as natural events and cycles affect it.
Do you also discount the well-documented depletion of the ozone layer by interaction with CFCs and similar chemicals? That seems to be a major environmental impact, and one that clearly has an anthropogenic component.
Nearly two decades after we cut back on CFC use, it looks like the ozone layer is finally starting to recover—or at least it’s stopped shrinking. Of course, it’ll take time. The whole reason we started using CFCs is that they didn’t seem to react with anything, so they’ll stay in the atmosphere for decades. UCI’s Sherwood Roland (who won a Nobel Prize for research on this topic) is quoted as saying, “This problem was a long time in the making, and because of the persistence of these chlorine compounds, there is no short-term fix.”
Look, up in the sky!
A few nights ago I was walking around sunset, and decided to look for something that had been mentioned last week on the Astronomy Picture of the Day: the Belt of Venus.
Somehow I’d never noticed that after sunset, the band of red encircles the entire sky at the horizon. Even more amazing, if you look away from the sun you can actually see the Earth’s shadow on the sky as a slightly darker blue below the pink. It reminded me of the view of Mauna Kea’s shadow on the cloud layer below. Oddly, though I didn’t pay any attention to it at the time, the Belt of Venus is clearly visible in that photo!
I guess at sunset I’m most likely to be looking at, well, the sunset. Or focusing on whatever it is I’m doing at the time.
This was Thursday night, so the moon was almost full. It rose just below the Belt of Venus, just inside the shadow. So close to the horizon, the moon illusion was in full effect, and it looked huge!
And me without my camera. *sigh*
Back in Space!
NASA Returns to Flight as Discovery Reaches Orbit.
Rather than getting my hopes up, I’ve been taking an “I’ll believe it when I see it” approach to this. And now, we’re finally back in space!
Here’s hoping the shuttle will be able to tide us over until the next-generation ship is ready. IMO we should have had another type of launch vehicle five years ago at the latest. That way Columbia never would have gone up, or if it had, we could have kept the newer fleet flying and just grounded the shuttles.
On a more personal note, I’m reminded of the time I went to see a shuttle landing. My mom took me and my brother out of school for a day, and we drove up with a family friend to Edwards Air Force Base where we set up camp with a zillion other people on the dry lake bed. We slept in the car, and the next morning everyone tried to get as close as possible to the chain link fence that marked the edge of the public viewing area.
Somewhere in a closet, I’ve still got a roll of slides from that landing. Of course, they had us so far away from the runway that I could barely catch the shuttle with a telephoto lens. I made an 8×10 print of the best slide in my grandfather’s home photo lab, and the shuttle was barely 1½ inches. [Update: I finally scanned the photos.]
And the shuttle that I watched land? It was Discovery, and it was the first flight since the Challenger disaster.
Now if someone can just convince NASA to give Hubble its 120-zillion mile checkup instead of just throwing it away…
On Google Moon
Google Maps has been extended to the moon, with all the Apollo landing sites marked.
Be sure to experiment with zoom for full effect.