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+ - India's Mars Mission back on track after hiccup!

Submitted by rahultyagi
rahultyagi (924414) writes "After running into some problems in its 4th orbit raising maneuver 2 days ago, Mangalyaan (India's Mars Orbiter Mission) seems back on track now. A supplementary burn lasting ~304 seconds was completed today, raising the apogee of MOM to 118642 km — the intended apogee after the original 4th orbit raising maneuver. After the glitch two days ago, ISRO again seems to be on track to become the first entity to have a successful mars mission on its first attempt. Though, of course, there are quite a few things that might still go wrong before this can be called a successful mission. Let's all hope that a year from now we are all celebrating the entry of another nation into the small club capable of successful interplanetary missions."

Comment: Re:Math Study (Score 1) 472

by rahultyagi (#38370454) Attached to: New Study Concludes Math Gender Gap Is Cultural, Not Biological
I was also a part of a similar study. We measured the breast size of kids from grades 3rd to 10th. While there was absolutely no gender-based difference in kids of 3rd grade, by the time they reached grade 10, the difference was clearly statistically significant. The young cohort pretty much proved that there is very little gender bias in breast sizes! "

Comment: Re:And the problem with this plan: (Score 1) 357

by rahultyagi (#38170904) Attached to: Rethinking Rail Travel: Boarding a Moving Train
You do realize that your nice old lady can't also drive a car without killing many people or herself in the process? Yet all of us seem to be doing fine with a culture dependent on driving cars. It appears that having a license test for use of these high speed trains would be simple enough, no?

Comment: Re:The actual physics (Score 1) 145

by rahultyagi (#35321342) Attached to: Frictionless Superfluid Found In Neutron Star Core
Actually, it is about 11000 light years away. The 300-odd years mentioned is actually the time when the supernova was observed on earth. A young neutron star just 300 light years away from earth would have been impossible to observe (since the supernova creating it would've wiped out any future observers. :) )

Comment: Re:No quite yet. (Score 1) 356

by rahultyagi (#29804533) Attached to: VASIMR Ion Engine Could Cut Mars Trip To 39 Days
hmmm... the problem is that for doing this you will also have to carry the whole asteroid with you. so, even though the thrust that will be provided by the ground asteroid should be enormous in totality, the acceleration it will provide will be mitigated to a large extent due to the necessity of accelerating the rest of the asteroid.

Then again, that is a problem with any rocket propellant/fuel... you take a lot of fuel and then propel it away, giving you some acceleration... you know what, never mind... that was a little stupid of me... the fact that you threw away the whole asteroid at the end, means that you gained that much momentum for yourself, regardless of how fast you threw the powdered substance away. I'll still post this, just in case someone else who, like me, has forgotten all physics might start wondering the same thing.

I wonder though, how much nuclear fuel would one have to carry to generate that much thrust? because, essentially the asteroid only gives you enormous amount of propellant to use, not fuel... to carry the amount of nuclear fuel that can propel essentially the whole asteroid away can't be a trivial problem!

Comment: Re:could someone please explain (Score 1) 166

by rahultyagi (#28259657) Attached to: Black Hole Swallows Star

Oh damn, forgot to include the relativistic jet. Idioth. Anyhoo... black hole spins, drags stellar gas / dust / occasional star towards it (accretion disk, om nom nom), things spin around faster than the speed of light (yes, FTL. Objects can't move faster than speed of light, but regions of spacetime can move FTL relative to other regions),

Now this doesn't make sense to me. what do you mean by "regions of spacetime can move FTL relative to other regions"? does it make any sense to talk about an object being stationary wrt a region of spacetime? if yes, then what is the relative velocity of an object that is stationary in one of these spacetime reference frames with respect to another object that is stationary in the other spacetime reference frame? FTL?

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