Wallpaper Wednesday (for Wendy and Daniel)

22 08 2012

NGC 2403.  Image credit: National Astronomical Observatory of Japan (NAOJ), Hubble Legacy Archive, Robert Gendler

Today’s wallpaper , which features the spiral galaxy NCG 2403 in the constellation of the Giraffe (Camelopardalis), is dedicated to Daniel and his family at the Santa Barbara Zoo, particularly the Senior Mammal Keeper.

The composite image of NCG 2403 was created by Robert Gendler, an astrophotographer living in Connecticut. Gendler combined  image data gathered by the Hubble Telescope with images captured by NAOJ’s Subaru Telescope to produce the multi-layered glow of atomic hydrogen gas surrounding the open clusters and dust lanes.

Click on the image to download wallpapers of various standard sizes.





Wallpaper Wednesday

16 08 2012

Endeavour’s Close Up. Photo credit: NASA

Today (August 16, 2012—I know, a day late with the wallpaper) Endeavour and Atlantis are switching places. By the time you read this, Endeavour will have backed out of Orbiter Processing Facility (OPF) 2, Atlantis will have rolled out of the VAB, and the press will have taken tons of photos of the two spacecraft as they came nose-to-nose for one last time (check out Kennedy Space Center’s twitter feed for some sweet images of the moment). Endeavour will now move into the VAB and remain there until its September flight to Los Angeles. Atlantis will be in OPF-2 until it moves to the Kennedy Space Center Visitor Complex in November. I hope to see you all at the grand opening of the KSCVC Atlantis exhibition in July 2013.

Click on Endeavour’s starboard wing to download wallpaper.





Wallpaper Wednesday

8 08 2012

Lovell Telescope under repair, Jodrell Bank Centre for Astrophysics

Today’s wallpaper commemorates the career of Bernard Lovell, pioneer of radio astronomy. Click on the image to reach the download page.





Wallpaper Wednesday

1 08 2012

Mars Rover Curiosity. Image Credit: NASA/JPL

You didn’t forget about me, did you? I’m about to land on Mars!

Mars Landing: 5-6 August 2012
10:31 pm Pacific, 5 August
11:31 pm Mountain, 5 August
12:31 am Central, 6 August
01:31 am Eastern, 6 August
05:31 am Universal, 6 August

Watch it live online at:
mars.jpl.nasa.gov
nasa.gov (NASA TV)
jpl.nasa.gov (Ustream)

Click on the image to download the JPL MSL wallpaper.





Wallpaper Wednesday

25 07 2012

Liftoff of STS-7 at 7:33 a.m. EDT on June 18, 1983. Photo credit: NASA

I would have loved to provide a glossy HD wallpaper of STS-7 in honor of Sally Ride’s first flight into space. Unfortunately, high-def images were almost non-existent in 1983 and I don’t have it in me to search for them (only a masochist runs a Google image search on the words “Space Shuttle Challenger”.) The image above links to NASA’s image gallery for Sally Ride and that’s going to have to do for now. Maybe I’ll write up something more comprehensive in a couple weeks.

ETA: I’ll come back to this later, but for now let me say this: Sally Ride gave me a lot when I was in high school. She didn’t have to do that and I’m grateful for her willingness to endure the invasions to her privacy in the 1980s. At the same time, as an academic, I can’t help but note the fundamental disconnect between the continued guarding of that privacy in the 2000s and her dedication to furthering the position of girls and women in science. I’m not a scientist, I’m in an allied field—the history of astronomy, not astronomy itself. Even so, I can say that my career in science studies has been affected by the fact that I’m a lesbian. One significant example: the financial award attached to my Fulbright-Hays DDRA fellowship was less than it would have been had I been heterosexual. The straight members of my Fulbright cohort were given money to support a spouse during their tenures as fellows. Even though my partner and I had been together for fifteen years at that point, I spent my research year by myself in another country, the support for my spouse legally withheld thanks to DOMA. Every time I opened up the Fulbright handbook to look up some regulation or other, I had to page by the DOMA statement that reminded me that I wasn’t an equal to other scholars in my field (I eventually got tired of being angry and deleted that page from the handbook). No matter how good my work is (and my fellowship record suggests it’s pretty good), I’ll never be treated as an equal as long as discrimination against lgbtq is legal in the United States.

And that’s the contradiction I see in Ride’s legacy. On one hand, she tirelessly worked to move young women into the sciences. On the other hand, she appears to have left unchallenged a very real stumbling block for some of those young women (appears to have left…I can only go by what the press is giving me right now). Does that mean I’m less grateful for, less appreciative of what she did for women and the world at large? No, not at all. But I don’t think it’s going to help any aspiring scientist if we ignore the larger implications of her choices. Coming out posthumously…well, I don’t think that erases the contradiction between the two positions.





Wallpaper Wednesday

4 07 2012

NASA’s RASCAL with Camera Mount Under “Blue” Moon. Photo credit: NASA Ames/Dominic Hart

There are a few things you shouldn’t do during a full moon. You should avoid criminal activity—your neighbors will probably recognize you in the bright light and if you end up in the emergency room, you’ll get inadequate care because of overcrowding (even if statistical analyses indicate there’s no relationship between the lunar cycle and emergency room chaos, do you really want to take the chance?). You should also avoid going to bed with the blinds open—your neighbors will have a good view of your after-dark activities and even if you’re intending to sleep, the moonlight will keep you awake by shining in your eyes (I proved this one last night). You should avoid looking at a magnified view of a full moon—your neighbors may wander over to ask what you’re observing after you set up the telescope, but they’ll be less than impressed when they go home with an after-image of the moon burned into their retinas (been there, done that, only with Mars).

What you can do during a full moon: naked eye observing. Sky and Telescope has some tips on studying the maria, craters, and volcanic patches on the lunar surface. Or, you can take some of Deirdre Kelleghan‘s advice and try your hand at Sketching the Moon (visit the publisher’s website). Another option: Study the lunar calendar so you know the date of the next Blue Moon (I’ll save you some trouble—it’s August 31, 2012). Or spend the evening looking through NASA’s archive of moon photos.

One thing you should definitely do is click on the image above to download the wallpaper of a Blue Moon fronted by NASA’s RASCAL. This wallpaper perfectly captures my ambivalence about some of NASA’s research (past and present). As much as I’d love to sink more money into programs like MSL and the Hubble Telescope, I can’t forget NASA’s close connection with military research. A beautiful Blue Moon shining behind a modified UH-60 Black Hawk reminds me of that association, but more importantly, it demonstrates how easy it is to distract me with shiny objects and moon rocks. I should be paying more attention to what’s going on outside the public eye.

Happy Independence Day.

 





Wallpaper Wednesday

27 06 2012

45-meter radio telescope at Nobeyama

A few months ago, I provided the link to kuriositas’ 10 Spectacular Radio Telescopes Around the World. I’m providing the link again so you can read about the Nobeyama Radio Observatory, home to the 45-meter telescope shown in the image above. I’d tell you more about it myself, but I have a pounding headache and just don’t feel like it.

Click on the image to download the wallpaper.





Wallpaper Wednesday

20 06 2012

Ancient Measuring Well, Aswan, Egypt. Image credit: Bob Sacha/National Geographic

Today’s post celebrates the arrival of the June solstice. The image above shows a measuring well in Aswan (Syene), Egypt. Aswan is situated such that at high noon on the solstice, the sun appears directly overhead. If you stand a stick straight up in a pile of sand, you won’t see its shadow. If you lean over a well, you won’t cast a shadow on the water because the sun is directly overhead. If you repeated this behavior the next day, and the day after that, and so on, you would see slivers of shadow appear and gradually grow larger as the days passed.

It was just this observation that inspired Eratosthenes’ legendary calculation of the Earth’s circumference. Eratosthenes was already in the habit of measuring the shadows cast in his hometown of Alexandria at noon on the solstice. When he noticed the lack of shadow in the southern city of Syene at the same time of day/year, he realized he could use the angle of the shadow in Alexandria to calculate the angle between the two cities as measured from Earth’s center. A few applications of geometry later, he arrived at a decent estimate of Earth’s circumference.

Click on the image above to download the wallpaper. Unfortunately, it’s only available in two sizes. To make up for that deficit, I’m giving you something even better: a link to Carl Sagan’s explanation of Eratosthenes’ work.





Wallpaper Wednesday

6 06 2012

SDO's Ultra-high Definition View of 2012 Venus Transit --- Path Sequence. Image credit: NASA/SDO/AIA

Was there any doubt that I’d be looking for a wallpaper featuring yesterday’s Transit of Venus? I’m happy to report that we didn’t have to rely on SDO images (as spectacular as they are!) to view it. We had mostly clear skies, warm evening temperatures, and lots of viewing equipment. I had my doubts as to whether we’d be able to view it with the naked eye—that is, the naked eye with protection—but it was easy to see through eclipse glasses. I used a solar projector made with a pair of binoculars. That was a last-minute project, but it made beautiful images, complete with cloud cover, sun spots, and Venus. We attended a public viewing event for part of the evening, courtesy of the DNR, Stonebelt Stargazers, and the Indiana University Astronomy Club, so we also had some excellent views through 8″ and 10″ telescopes. You can see a few photographs, including one from the solar projector showing Venus against the backdrop of the Sun, on my flickr site.

Click on the image to download today’s wallpaper.





Wallpaper Wednesday

30 05 2012

Capturing the Dragon. Image credit: NASA

Think of me sometime between 2:30-4:30 a.m. EDT, when I’ll be in bed with my iPhone, watching the NASA TV coverage of the un-berthing of Dragon. Think of me again about five hours later, when I’ll be struggling to be productive on three hours of sleep.

Click on the image to download wallpaper in (NASA’s) standard sizes.








Observatories and Instruments