BANNED
I am worthless beyond hope. Join Date: May 2004
Location: Inner Swabia. If you have to ask twice, don't.
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Antimatter Man
Join Date: May 2004
Location: that interweb thing
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The SCAPE-suited humans probably don't help with the conspiracy nuts, but they do provide scale. ... Meanwhile... the Japanese AKATSUKI probe arrived at Venus last night. Climate observations to follow. ... And if you can help program computers to learn, and help explain dark energy, NASA might give you an iPad. All those who believe in telekinesis, raise my hand. |
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M AH - ch ain saw
Join Date: May 2004
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Excuse what may be a simple question for some of you space nuts; what are those guys all suited up for?
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Senior Member
Join Date: Dec 2005
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The Staypuff Marshmellow Man is behind the vehicle
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BANNED
I am worthless beyond hope. Join Date: May 2004
Location: Inner Swabia. If you have to ask twice, don't.
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It looks like they might be carrying around a chemical sniffer for ceramic dust, which is quite toxic. Or a Geiger counter for radiation?
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Antimatter Man
Join Date: May 2004
Location: that interweb thing
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All those who believe in telekinesis, raise my hand. |
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Antimatter Man
Join Date: May 2004
Location: that interweb thing
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Light provides lift to a 'Lightfoil'
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BANNED
I am worthless beyond hope. Join Date: May 2004
Location: Inner Swabia. If you have to ask twice, don't.
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What? Does no one know how optical tweezers work? The summary suggests that this is completely new. It is not.
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Veteran Member
Join Date: May 2004
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Also, lasers.
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BANNED
I am worthless beyond hope. Join Date: May 2004
Location: Inner Swabia. If you have to ask twice, don't.
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Selfish Heathen
Join Date: May 2004
Location: Zone of Pain
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Antimatter Man
Join Date: May 2004
Location: that interweb thing
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SpaceX Dragon spacecraft completes successful two-orbit flight.
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Private Enterprise goes to spaaaaaaace! BBC story (with blastoff video for UK users) and diagrams for everybody else All those who believe in telekinesis, raise my hand. |
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Veteran Member
Join Date: May 2004
Location: Toronto
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I just read that the SpaceX is capable of ferrying 7 astronauts to the Space Station for 10% of the cost of a NASA shuttle mission.
Is this true? |
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BANNED
I am worthless beyond hope. Join Date: May 2004
Location: Inner Swabia. If you have to ask twice, don't.
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Certainly less expensive than a shuttle mission -- but it isn't designed to be a shuttle replacement, so there's that...
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Antimatter Man
Join Date: May 2004
Location: that interweb thing
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Voyager nears Solar System edge
<-- Not to scale. Voyager is approaching the edge of the bubble of charged particles the Sun has thrown out into space Quote:
All those who believe in telekinesis, raise my hand. |
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Hates the Infotainment
Join Date: May 2004
Location: NSA Archives
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Riddle me this... when there is a CME (which I understand to be a huge electro-magnetic outburst essentially), why does it take 1-2 days for the thing to reach us instead of the 8 minutes that the sun's light takes? Doesn't the "emp" from that CME also travel at the speed of light?
http://www.bbc.co.uk/news/science-environment-12493980 ...into the light of a dark black night. |
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Selfish Heathen
Join Date: May 2004
Location: Zone of Pain
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Hates the Infotainment
Join Date: May 2004
Location: NSA Archives
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Ah, so less of an EMP than a mass of charged particles. Well in that case I guess the silver lining is, we get 24 hours warning to panic and head for the bunker.
...into the light of a dark black night. |
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Selfish Heathen
Join Date: May 2004
Location: Zone of Pain
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Basically.
(Also, handy reminder: the M in "CME" stands for Mass! ) |
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is the next Chiquita
Join Date: Feb 2005
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A question for this space ignoramus:
Just exactly what makes the boundary between heliosphere and interstellar medium a "shock", and why does it appear to occupy such large distance? I guess the intuition (sure reliable, eh? ) would have been that solar winds would gradually fizz out and given the vastness of space involved, it seems odd to imagine there's a "shock". Have I made the mistake of assuming that interstellar medium = void? Or is it just a poor choice of wording like "annihilating particle" which actually doesn't violate the conservation of mass/energy? |
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Lovable Bastard
Join Date: Dec 2005
Location: Boston-ish
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As the solar wind expands outwards, it covers more space, which means it loses density. Although the interstellar medium is usually called a void, it is not completely devoid of matter. IIRC it's something like one atom per square meter.
And since it has mass, it has pressure. As the solar wind expands, it's density decreases. At about 80 AU, it's pressure drops below that of the void's, and thus, it gets "pushed" back towards the sun. We call this point the termination shock. Logic, logic, logic. Logic is the beginning of wisdom, Valeris, not the end. |
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Antimatter Man
Join Date: May 2004
Location: that interweb thing
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And the 'shock front' isn't a fixed distance out because of variability of solar activity.
Meanwhile... the search ramps up for planet Tyche out in the Oort cloud, which might be four times larger than Jupiter and the alleged culprit responsible for flinging long-period comets our way. Pluto out and Tyche in as far as planet count goes is less interesting than the fact it might be an interloper. Cool stuff. Literally. All those who believe in telekinesis, raise my hand. |
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Hates the Infotainment
Join Date: May 2004
Location: NSA Archives
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As dumb as my question seemed, I realize this, but I thought that the EMP part would basically surge out ahead of the massive particles and travel the usual 8 minutes to hammer us. BTW has anyone started digging their bunker yet? Or maybe the big solar blast this year will be like the movie Knowing and the whole earth will be charred to a crisp... except for the mute alien-angels coming to save our children. Childrens are our future after all! ...into the light of a dark black night. |
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is the next Chiquita
Join Date: Feb 2005
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I also have this idea that because gases are supposed to diffuse, it's weird to imagine there's a sphere of mass being trapped by what is relatively a void. Thank goodness my lack of imagination does not invalidate the reality! |
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Ninja Editor
Join Date: May 2004
Location: Bay Area, CA
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¡Damned!
Join Date: May 2004
Location: Purgatory
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My guess would be a still from the movie "Knowing."
Haven't seen it. Just a guess. |
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Hates the Infotainment
Join Date: May 2004
Location: NSA Archives
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Dave must not like reading my posts.
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BANNED
I am worthless beyond hope. Join Date: May 2004
Location: Inner Swabia. If you have to ask twice, don't.
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um... emp isn't going to be all that strong after traveling an AU.
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Hates the Infotainment
Join Date: May 2004
Location: NSA Archives
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I guess that makes sense but it takes AU-like distances for them to degrade doesn't it?
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Hates the Infotainment
Join Date: May 2004
Location: NSA Archives
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I'm not much for conspiracies but curious that the only two nose-cone failures I've heard of for this rocket, were payloads designed to study various effects of climate change. Hmm.
http://www.bbc.co.uk/news/science-environment-12551861 ...into the light of a dark black night. |
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