Democratic Underground Latest Greatest Lobby Journals Search Options Help Login
Google

Will probe's upcoming fly-by unlock exotic physics?

Printer-friendly format Printer-friendly format
Printer-friendly format Email this thread to a friend
Printer-friendly format Bookmark this thread
This topic is archived.
Home » Discuss » Topic Forums » Science Donate to DU
 
n2doc Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Nov-12-09 08:58 AM
Original message
Will probe's upcoming fly-by unlock exotic physics?

18:17 10 November 2009 by David Shiga
What's causing spacecraft to mysteriously accelerate? The Rosetta comet chaser's fly-by of Earth on 13 November is a perfect opportunity to get to the bottom of it.

The anomaly emerged in 1990, when NASA's Galileo spacecraft whizzed by Earth to get a boost from our planet's gravity and gained 3.9 millimetres per second more than expected. And the European Space Agency's Rosetta spacecraft had an unexpected increase of about 1.8 millimetres per second during a previous fly-by of Earth in 2005.

Scientists have ruled out various mundane explanations like atmospheric drag or the effect of deviations in Earth's shape. This has led some to propose that exotic new physics is involved, such as modifications of Einstein's general relativity, the currently accepted theory of gravity.

All eyes are now on Rosetta, which is set to swing by Earth again at 0745 GMT on 13 November. It is en route to a comet, and will travel around 2500 kilometres above our planet's surface at over 13 kilometres per second. If it gains an extra 1.1 millimetres per second relative to Earth, it would vindicate a formula that reproduces the anomalies seen so far.

http://www.newscientist.com/article/dn18135-will-probes...
Printer Friendly | Permalink |  | Top
byronius Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Nov-12-09 10:05 AM
Response to Original message
1. Perhaps I should reign in the mini black hole in my garage,
But it scratches at the door if I don't give it a little freedom now and then.
Printer Friendly | Permalink |  | Top
 
phantom power Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Nov-12-09 10:41 AM
Response to Reply #1
2. That must be a remarkable door.
Printer Friendly | Permalink |  | Top
 
joshcryer Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Nov-12-09 03:07 PM
Response to Original message
3. I read the ex-NASA paper, it explains frame dragging, something Gravity Probe B could not discern.
It's actually going to be remarkable if the probe does have the same effect.
Printer Friendly | Permalink |  | Top
 
DU AdBot (1000+ posts) Click to send private message to this author Click to view 
this author's profile Click to add 
this author to your buddy list Click to add 
this author to your Ignore list Fri Apr 18th 2014, 09:54 AM
Response to Original message
Advertisements [?]
 Top

Home » Discuss » Topic Forums » Science Donate to DU

Powered by DCForum+ Version 1.1 Copyright 1997-2002 DCScripts.com
Software has been extensively modified by the DU administrators


Important Notices: By participating on this discussion board, visitors agree to abide by the rules outlined on our Rules page. Messages posted on the Democratic Underground Discussion Forums are the opinions of the individuals who post them, and do not necessarily represent the opinions of Democratic Underground, LLC.

Home  |  Discussion Forums  |  Journals |  Store  |  Donate

About DU  |  Contact Us  |  Privacy Policy

Got a message for Democratic Underground? Click here to send us a message.

© 2001 - 2011 Democratic Underground, LLC