Archive for the ‘Light Waves’ Tag
Credits: Event Horizon Telescope collaboration et al.
So where does one begin on a day like today? I can’t honestly say what story could top seeing a photograph of an actual black hole. But the news certainly is fascinating. And check out the link. There’s a complete picture of Messier 87, a giant galaxy some 55 million light years away, located in Virgo.
Einstein theorized in a paper published in 1915 that star’s light rays curved around the sun during an eclipse. That meant the stars appeared about 1.75 second of arc away from their positions.
In May 29, 1919, when a six-minute total eclipse in Brazil caused British astronomer Arthur Eddington to determine that light rays from other stars bent when subjected to the gravitational field of our sun. He proved this through the use of photographs, and others have proven it since.
Jump to 2016. MIT graduate student Katie Bouman created the algorithm that produced the first image of the black hole. Her contributions seem to be a bit underreported, but thanks to her work, we now see the image pictured above.
Credit: Kennedy Space Center
The second big story (to me at least) is Falcon Heavy. It was supposed to launch today, but thanks to high winds aloft, we’re going to have to wait until tomorrow. But the cool thing about it is its three boosters, all expected to land perfectly. I’m always fascinated by this new generation of rockets. Elon Musk, for all his faults, is a genius. Not only did he create a better class of rockets, partly recyclable, he also made their capsules so sleekly modern.
And lastly, on April 11 NASA will host a teleconference on its study of its astronaut twins, Mark Kelly and Scott Kelly. This eagerly-awaited report will detail how Scott Kelly was affected by living in the ISS for 340 days, as compared to his twin brother, Mark Kelly, who remained on Earth. So far, these are the only twins who have both served on the ISS, and, as such, are uniquely qualified for this important study.
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Credit: ee.princeton.edu
Here’s another wonderful video from Dennis Overbye at The New York Times. In it, he explains how time and light partner up to offer a show from nature centuries after it occurred.
Light, in space, is literally a living memory of events long past. There’s a profound statement at the accompanying article’s end, stating that even the light on our face shine forever.
Can you imagine? That glorious day at the beach where you smiled at the sun as it reflected on the waves and your face? That’ll live on, in the shape of light rays. And so, whatever light touches, it has the ability to record and send off our particular experiences. Using light to record humanity? There’s been speculation with sound waves and how others out there will find us via our words, sounds, broadcasts. How would they make sense of our pictures? They’d arrive apart, since light travels so much faster than sound ever could.
Now imagine if both the sound and light waves intersected, but with completely different meanings. Light from the 16th century paired with sounds from this one – this jumbled mess as message. Who would read it? How might it be interpreted?
Light is absorbed when it encounters obstacles, such as black holes. Light waves, from a fairly concentrated source on Earth traveling outward, face the possibility of reaching entirely different destinations. Some of those particles risk absorption, but others fly free. A patchwork image received by an off world interpreter might wind up with a Swiss cheesy image not entirely accurate of what it was meant to represent. Perhaps, too, that’s what we might receive here at the home planet.
Darkness is the absence of light. What gives some light waves the ability to survive while others terminate, creating darkness? Or is darkness merely another form of light? Is it light that the eyes on this planet have not evolved to discern? What forms out there might interpret our version of light as darkness?
Just a little something for your minds to unravel as you attempt to rest your weary brains for the night.
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Moon, Stars and Beyond 