LISA Pathfinder’s cubes floating free
More gravitational wave news: LISA Pathfinder’s two gold-platinum 46mm cubes have been released and are now floating free inside their spacecraft.
After a week of further testing, they will stop controlling the cube’s positions with electrostatic force. They will then watch them very precisely with lasers to test whether the equipment is capable of detecting distance shifts small enough for a future version, made up of three such spacecraft, to detect gravitational waves. The idea is that, as a wave rolls by, the cubes will shift positions at slightly different times, just as different beach balls will do so on ocean waves.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
More gravitational wave news: LISA Pathfinder’s two gold-platinum 46mm cubes have been released and are now floating free inside their spacecraft.
After a week of further testing, they will stop controlling the cube’s positions with electrostatic force. They will then watch them very precisely with lasers to test whether the equipment is capable of detecting distance shifts small enough for a future version, made up of three such spacecraft, to detect gravitational waves. The idea is that, as a wave rolls by, the cubes will shift positions at slightly different times, just as different beach balls will do so on ocean waves.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
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