In case you missed this story from earlier this week, I wanted to point out an interesting historical event.
For years, people have wondered if the astronauts aboard the International Space Station could see a flashlight, or perhaps laser pointer, pointed at it from the Earth’s surface. While it was theoretically possible and tried a number of times, it had never been done successfully… until March 4, 2012.
Texan amateur astronomers of the San Antonio Astronomy Association and the Austin Astronomy Society put together a plan to prove the possibility. On March 4, these amateur astronomers implemented their experiment. They left the urban lights for dark skies (and as importantly, a dark ground from the vantage point of the ISS) at the Lozano Observatory. There, they set up a one-watt blue laser and a pair of bright spotlights, complete with a simple, yet effective, system to strobe the spotlights: people holding wooden boards. Timing had to be calculated precisely for a couple of reasons. Not only did the ISS have to pass their dark location overhead at night, but it had to be such that the ISS had a view of the Earth without the Sun blinding their view; after all, it is the bright sunlight reflecting off of the ISS that makes is so bright and visible to us on Earth.
Their timing, and a few months of planning, paid off. As the ISS came overhead of the anxious amateur astronomers, they flipped on the laser and began alternating the spotlights on-and-off in two-second intervals. ISS Expedition 30 Flight Engineer, Don Pettit, had been involved in the planning of the experiment and had been communicating with the group in the days leading up to the attempt. At the time that the ground crew began their attempts to flash the space station, Pettit was situated in the ISS Cupola, eyes peeled with his camera snapping pictures. The ISS pass was complete within a few minutes, and the group had to anxiously await feedback from Pettit. The next day, their confirmation came.
(Click image for larger size / Image Credit: Don Pettit/Fragile Oasis)
Success! According to Keith Little, Marketing Director of the San Antonio Astronomical Association, Don Pettit told him that not only could he see the spotlights, but easily saw the laser by itself!
It’s wonderful when astronauts orbiting the Earth can work together with amateur astronomers to collaborate on experiments such as this, and its icing on the cake when they make history in the process.
Have you seen the wondrous show that’s been taking place in the night sky recently? Maybe you noticed what appeared to be some especially bright stars, glittering near a crescent Moon. Perhaps you haven’t been looking up at the night sky lately (shame on you) or conditions have been too cloudy to give it a look (I live in a coastal city in Alaska, I feel your pain). Whether you’re looking or not, there’s a fantastic conjunction taking place, starring (pardon the pun!) the Moon, Jupiter, and Venus.
I took the following photo shortly after sunset on February 28, 2012, from within Joshua Tree National Park. Unfortunately, I didn’t have a lens to give me a wider field of view, but the top of a Yucca Plant provides a nice touch.
[Click image for larger and unlabeled version / Credit: Ryan Marquis/46BLYZ]
This cosmic spectacle will continue over the next few days, so get out and enjoy it while you can.
Also in the night sky this month:
While the Moon will have moved away from the planets, Venus and Jupiter will be within three degrees of each other on March 12. That’s approximately the same “width” as three fingertips held at arm’s length… The planets will appear quite close to one another!
Mars also refuses to be left out of this month’s planetary attention. Look for the red planet in the Eastern sky, just a few hours after the sun sets.
Cloudy skies, but still want to see the Geminids?
NASA has created a live webcam feed from their all-sky meteor camera at the Marshall Space Flight Center. A radio-static “soundtrack” is being played along with the video.
When a meteor burns up in the atmosphere, it also produces a trail of ionized particles that reflect radio waves. If the meteor is located in the right spot in Huntsville’s sky, the signal from the station transmitter is reflected to the radio receiver, and you will hear a “ping” above the static noise. – NASA
If you have clear skies, make it a late night and watch what should be a brilliant meteor shower. If the handful of fireballs I’ve seen over the past few nights are any indication, we should have a nice show as the Geminids peak this evening and into tomorrow morning. The best views will certainly be after the Moon sets, especially between 1am and 3am local time; however, if you cannot stay up that late look towards the East before you go to bed and you should see a handful.