Mars wasn’t always the cold, dry world that it is today — billions of years ago it likely looked a lot more like Earth, with seas and rivers of liquid water on its surface and a thick atmosphere with air and clouds. But something happened over the course of Mars’ history to transform it from a warm, wet world to a cold, desiccated desert planet, and while there are many viable suggestions as to what process is responsible, no verdict has yet been delivered.
This video, just released by NASA’s Goddard Space Flight Center, shows what Mars might have looked like four billion years ago. As the camera tracks back the clouds gradually disappear, the lakes and rivers turn to rubble-strewn plains and the skies change from blue to pale orange. As we rise above the dust clouds that roll across the planet, we see the first evidence of modern times: NASA’s MAVEN spacecraft, flying high overhead to investigate the mystery of a lost Mars.
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I’ve featured many of Alan Friedman’s amazing photos of the Sun here on Lights in the Dark, starting from the very first one I came across via the venerable Astronomy Picture of the Day (APOD) in November 2009. I’ve even featured Alan’s work in several articles I’ve written for National Geographic News, Discovery News, and Universe Today. Alan runs an independent greeting card print shop in Buffalo, NY, and in his spare time likes to collect vintage hats, travel, do some astrophotography, and oh yeah, also take the most un-freakin’-believable photos of our home star in hydrogen alpha light from his own backyard.
(I hope you didn’t miss that part about the Sun.)
Every year the Royal Observatory in Greenwich, England holds a contest for best astrophotography, and this year they visited three of the entrants to get the stories behind their photos. While it looks like Alan didn’t win a grand prize this year (but he did take second) the video above shows how — and why — he makes his photos.
“The coolest thing about the Sun for me as the subject for photography is it’s never the same two days in a row. And it’s the only star we can see detail on, at least with current technology.”
– Alan Friedman
It’s quite a beautiful video, and makes you feel like you’re a guest at Alan’s home looking up through his telescope along with him and his family.
Currently Alan’s sun photography is on display at the Orange County Great Park Gallery in Irvine, CA Thursdays through Sundays from Sept. 15 to Dec. 1. If you’re in the area, don’t miss the chance to check it out. Admission is free.
Video credit: Royal Observatory Greenwich/ Lonelyleap
Yesterday, io9.com writer Robert Gonzalez shared a truly incredible image of a sunspot taken by the New Solar Telescope (NST) at Big Bear Solar Observatory in California. The detail of the magnetically-active region and surface of our home star is simply stunning, thanks to the NST’s new Visible Imaging Spectrometer — literally setting a new record for the most detailed visible-light image of a sunspot ever.
In sharing the image on my Facebook page (you ARE following me there, right? ) I was alerted by follower Cody Reisdorf that such images aren’t new; sunspot photos and videos have been being captured for quite some time — albeit not to such a fine degree of clarity — by other observatories, notably the Swedish Solar Telescope (SST) located on the island of La Palma. The video above was made from SST observations in May 2010 by Vasco Manuel de Jorge Henriques of the Institute for Solar Physics. It shows the mesmerizing magnetic movements of a sunspot, which is basically an optically-dark region on the Sun’s surface where upwelling magnetic fields prevent convection from occurring.
It doesn’t have the incredible clarity of the NST image, but it does show the dynamics of the Sun’s surface. Amazing to think these blemishes are each easily as large or larger than our entire planet…incredible!
Thanks to Bob Trembley (another LITD fan) for uploading the video to YouTube… so I didn’t have to.
Video credit: SST/ISP/Vasco Manuel de Jorge Henriques
Note: Reposted/updated article from 2012.
“That’s one small step for a man… one giant leap for mankind.”
I’m not sure what else need be said about the significance of what happened on this day in 1969, 44 years ago… it was a shining moment in human history, and will be — should be — remembered forever as an example of what people can achieve when challenged, driven and inspired.
Maybe more giant leaps have been made since then, and undoubtedly more will be made in the future, but this was the first… and to this date, still very much the biggest.
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That’s not a suggestion; it’s an order.
It doesn’t matter if it’s not scientifically accurate, or that asteroid fields don’t really work like that, or that you can’t “swim” through space. None of that matters with something at this level of cool. Enjoy!
Video and music by Professor Soap
It really is. I mean, nevermind that it comprises over 99% of all the mass in our solar system, that it supplies our planet with the energy needed to sustain life on its surface, that its constantly-blowing solar wind helps keep some of those nasty cosmic particles out of the planetary neighborhood, and that it makes a bright sunshiny day even possible (but remember to wear sunscreen!)… in addition to all that, it’s also just really, really cool.
Watch the video above and you’ll see what I mean.