K-Squared Ramblings

Exoplanets: Say Cheese!

I remember being bowled over when astronomers first detected planets around other stars. Nowthey’ve actually managed to get pictures!

Of course, they’re about as detailed as pictures of the stars at a science-fiction convention panel taken from the back of the room, or the band on stage from the upper-top-fifth-tier seating (see! that dot there is so-and-so!), but still…it’s a start.

There’s one photo from Hubble of the planetary debris disc around Fomalhaut, with a little dot that apparently has been tracked in other images, consistent with being in orbit around the star. It’s estimated at being about the size of Jupiter and about four times as far out from its star as Neptune is from the sun.

Meanwhile: consider that we can see something the size of Jupiter even though it’s 25 light years away!

Then there’s one from the Gemini North telescope that has actually caught two planets in orbit around a star called HR 8799 — a photo of a planetary system!

Update: Hubblesite has more on Fomalhaut including this image showing Fomalhaut B’s location in 2004 and 2006:

Look! Up in the Sky!

The event runs from October 1–15, so there’s only 4 nights left! Get out there, and take a look at the stars!

Lunar Eclipse pics

I decided to go for it, and set my alarm for 2:30 AM (ick) to see the eclipse. The moon was nearing totality at that point, with a too-shallow crescent near the bottom and the rest in slightly reddish shadow. My original plan was to lie down on the balcony and watch, but it turned out there was a tree in the way, but if I went over to the other end, by the patio table, I was able to see it.

I watched as the crescent shrank to a sliver, and finally the moon was shaded dark red to dull red to light red to a much dimmer white than usual. The deeper reds slowly spread across its face, edging out the brighter colors near the edge of the Earth’s shadow.

I brought my cheesy little digital camera, and took some photos. It promptly started warning me the battery was low, and I had to dig around in the dark to find the spare. I think this is the best of the pictures, as far as showing the eclipsed moon itself goes:

Eclipsed Moon, 3:13 AM

Earlier in the evening I was testing different shutter settings. I thought this photo from the floor of the balcony turned out interesting:

Yes, that’s lit by moonlight (in a long exposure).

OK, I’m going out to take one last look at the moon (I think I heard the downstairs neighbors’ door open a few minutes ago, so at least I’m not the only one up for this) and then go back to bed. I’ll look through my photos again tomorrow and post anything else that looks good.

Update: Here’s a shot from deeper in totality, just after the mid-point of the eclipse:

Eclipsed Moon, 3:40 AM

And here’s the Pleiades, which I spotted when I turned around and looked up. A far cry from this, but hey, I figured I was doing pretty well to be getting photos of stars with this type of camera in the first place.

I think the last time I saw the Pleiades, Hyades, Taurus and Orion in August, I was something like 14 and on a trip with my scout troop to do whitewater rafting. We slept out under the stars and I just happened to wake up at 3 in the morning.

OK, sleep is calling to me. Signing off…

Update 2: After I went to bed, I realized that I shouldn’t have dismissed my idea of scrounging up some film and pulling my manual SLR camera out of the closet. Between the better optics, more shutter control, and an actual telephoto lens, I probably would have gotten considerably better pictures. I just don’t think we have any rolls of film lying around that haven’t expired, and I didn’t want to run out at 11:00 to get some. Ah, well. Something to think about for next time.

Also, I realized that these blurry pictures look kind of like a Moon-sized version of Mars. Hmm, that might confuse some people.

Update 3: You have to check out Thursday’s APOD: an incredible telescopic image of the moon taken during totality.

Lunar Indecision

I’m still trying to decide whether I should set an alarm to wake myself up at ski-o’clock in the morning to see tonight’s/tomorrow’s lunar eclipse. I mean, I skipped the Perseid meteor shower a few weeks ago, but that would have required not only getting up in the wee hours of the night, but driving somewhere with less light pollution.

I mean, I should be able to walk outside and look out at a blood-red moon… at 3:00 in the morning.

*grrr*

(links via BA Blog)

Update: Ah, the wonders of text search and delayed indexing. It seems that lots of people are searching for the phrase, “eclipse tomorrow,” leading to a spike in hits to this entry from last March… even though today’s post would be a more appropriate destination.

Update 2: I went for it. Here’s my write-up.

Pumpkin Moon

We were driving home from visiting relatives this evening, and noticed a dull orange ellipse on the horizon, appearing and disappearing between trees. It didn’t take long to realize it was the moon, just beginning to rise.

As the freeway twisted and turned, and we went through areas full of houses, retail centers, and trees, we lost and regained sight of it. The moon illusion was in full effect, making it look huge, plus the bottom edge was flattened, just like the sun at sunset—only you can look at the moon much longer. (Well, except when you’re driving.)

It rose through a bank of clouds or haze, climbing through dark bands, and slowly turned from orange to yellow, then turned paler. By the time we got home at 10:00, it had assumed its normal circular shape (with a tiny bit shaved from the upper right, since it was a day past full), and didn’t look particularly bigger than usual.

We don’t get to see the moon so close to the horizon very often. For one thing there are mountains to the east, but more importantly there are buildings all around. As we saw with the drive home, it doesn’t take much height to block the horizon from view. By the time we got home, roughly an hour past moonrise, it was just visible over the tops of the nearby buildings from our balcony.

Deja View

Follow-ups to two past blog entries.

First, remember on our most recent trip to Las Vegas (last March) we repeatedly encountered a slow-moving, hand-painted truck labeled “Henry’s Moving” on the drive out. Well, after a trip to Fry’s this past Sunday, we spotted it again.

Second, for the first time in 1½ years, I managed to spot Venus in broad daylight again. I went downstairs to grab a snack about 3:20 this afternoon, and noticed the first-quarter moon in the East. Remembering how I located Venus the first time, and already in the shadow of the building, I traced a line from the moon toward the sun, and found it, a tiny white point in the light blue sky. It was almost directly overhead, and just outside the area around the sun where the sky turns increasingly white. I lost sight of it, but managed to locate it again before I went into the cafe, and once more when I walked out.

I probably looked silly, staring straight up at the sky. But hey, how often do you see another planet during the day?

Edit: I went back down a few minutes later and took a photo. It actually showed up, which seriously surprised me.

Crescent moon and Venus

I walked out the front door last night around 5:50 to pick up the mail, and immediately walked back in to get the camera, because this is what I saw:

My parents gave me a flexible mini-tripod for Christmas, and it proved very helpful here, as there was nowhere flat where I could set the camera and still get a good view. I ended up coiling it around a stair railing, which held the camera in place long enough to get a decent exposure.

I seriously thought about pulling my SLR camera out of the closet and seeing whether I had any film for it, but ultimately decided against it.

Daytime… Comet?

Well, I tried again at lunch to see if I could spot Comet McNaughton during the day, just in case it was still bright enough. No luck, but I set my camera on max zoom and took a set of pictures in roughly the right area, just to see if I could spot something.

And, well, I did. I’m just not sure what. This was 1:28 pm (33.66 N, 117.75 W), looking roughly southwest, with the sun placed behind a wall to the right. The sun is to the right and above the frame. I don’t have a good sense of distance in the sky, but this is in the right direction to be either Venus or the comet.

Or it could be a passing high-altitude airplane that I didn’t notice.

If it is the comet, the tail is completely invisible, as it should be stretching down to the lower left (away from the sun) and I can’t make anything like that appear with any of the image enhancement tools I’ve tried.

This is unprocessed. All I did was load it from the camera and crop it. And here’s a copy of the whole photo (this was at full ~3x zoom on a Canon PowerShot SD600) with the position of the object and the rough position of the sun pointed out.

Comet!

The skies were surprisingly clear today. Four of us at work walked outside after sunset to a bridge near the office, and saw Comet McNaught. It was visible from ~5:10/5:15 to 5:28, at which point it slipped below the line of hills to the west.

We saw it against the red sky, slowly dropping through the (fortunately sparse) clouds. It was easily visible to the naked eye as a fuzzy white spot, with a hint of a tail pointing straight up that was a lot clearer in binoculars. The tail looked like a U or a V, fanning out at what looked like (but probably wasn’t) a 45° angle.

Well, my fingers are finally warming up. (I made the mistake of not grabbing my jacket, and went out just in my sweater.) Time to wrap stuff up.

Update January 13: I managed to catch another glimpse of it tonight. Unfortunately I was just arriving at the shop to pick up my car, and it was just closing, so I didn’t have a chance to watch it set (or see much more than a fuzzy white dot.) My watch said 5:02. By the time I got out, it had set beneath the building across the street, and there just wasn’t anywhere nearby enough with a clearer view of the western horizon.

On the plus side, I did manage to spot Venus while the sky was still light, and get a picture. It’s not quite as exciting as spotting it at one in the afternoon, but by adding more blue, you get an idea of what that looked like:

Update January 14:

I was looking over the photos I took last night (Saturday) and discovered I could actually find it by messing around with levels. On the left is the original photo, with a little bit of color correction to match what the sky looked like. The background’s still too bright to see the comet, though it was visible to the eye. On the right, I’ve adjusted the heck out of the image, and there’s a very slight bright spot right where it should be (I framed the shot so that the comet would be near the light pole, making it easier to find). Actually, now that I look at it again, it’s just barely visible in the less-processed photo on the left.

Also, this is cool: the comet has gotten bright enough to be spotted in daylight. (via Slashdot) I didn’t have any luck looking for it this afternoon, but I chalk that up to lower altitude and city haze.

Update January 15: I spotted something today, but I’m not sure what…

No comet for you!

I’ve been hoping for the last few nights to get out around sunset and look for Comet McNaught. Unfortunately, it’s been cloudy all week by the time sunset rolls around. And in a couple of days, it’ll slip past the sun and appear in the morning sky instead. At that point, I won’t have a chance of seeing it. Even if I could get myself out of bed before dawn, the eastern horizon is blocked by mountains.

Pluto Needs Rocks

I went to Worldcon 64/L.A.Con IV on Saturday. Mainly I went to a couple of panels, checked out the art show and the dealer’s room, and looked at some exhibits.

Out in the exhibit hall, near the art show, someone had set up this display:

It’s too small to read at this size, so I’ve transcribed it: Read the rest of this entry »

Mauna Kea Star Trails

Today’s Astronomy Picture of the Day is an incredible long-exposure picture of star trails above Mauna Kea:

I think the picture says it all.

Daystar!

I saw the planet Venus four times on my walk to and from lunch today! Yes, in broad daylight!

Someone on Slashdot mentioned it was possible last week. I took it seriously because back in high school, I used to watch Venus fade into the brightening sky on winter mornings. Often I could still find it once I arrived at school, since I knew exactly where to look.

I tried unsuccessfully a couple of times over the past week, but today I had a ~20-minute walk mostly facing southward, so I thought I’d give it a shot.

I used the Moon as a guide, trying to guess the distance based on how far apart they were last night. As I passed through a building’s shadow, I spotted a stationary white dot in the right area, a bit more than a hand span away from the crescent Moon in the direction of the sun, barely visible next to some wispy clouds. I couldn’t find any sign of a con trail, and it didn’t move, so it clearly wasn’t an airplane, but I was able to look away and back and still see it. Read the rest of this entry »

Venus Shadows

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.

(via Slashdot)

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.

(P.S. sorry for the repeated updates—I accidentally hit “Publish” instead of “Save and Continue”)