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Fastest Spacecraft Ever?!?, Which one is it? |
 Jan 24 2006, 08:43 AM
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 Member  Group: Members Posts: 648 Joined: 9-May 05 From: Subotica Member No.: 384  |
There was statement that recently launched New Horizons is the fastest spacecraft to leave Earth. The velocity was 16.2 km/s relative to the Earth according to "Jonathan's Space Report".
QUOTE After the Star 48B burn, the payload had reached escape velocity not only with respect to the Earth but also relative to the Sun (The velocity was 16.2 km/s relative to the Earth and I estimate an asymptotic velocity of 12.3 km/s, corresponding to 42.6 km/s relative to the Sun... So: New Horizons is fastest to leave Earth at 16.2 km/s (relative to Earth). Voyager-1 is fastest to leave Solar System at 17.374 km/s (relative to Sun). Now that is OK. but what is this? Today's "Astronomy Picture of the Day" features launch of New Horizons and in text bellow image is one particularly interesting link to "Guinness world of records"... Guinness world of records; There "Mr. Guinness" claims that the fastest spacecrafts ever, were two Solar probes "Helios 1&2"...According to him those spacecrafts had speed of 252,800 km/h which is staggering 70.2 km/s...BUT RELATIVE TO WHAT?????  Can somebody explain this? -------------------- The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
Jules H. Poincare My "Astrophotos" gallery on flickr... |
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May 4 2006, 11:40 AM
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 Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
My concern is that the VSE is going to become Apollo Mark 2, where it takes
away resources for real science missions just to put a few extra humans on the Moon for slightly longer stays. Then the politicians of 2020 or so decide it is not worth the effort, or the public gets bored again, or both, and we end up with a few more flags and footprints, the Moon is abandonded for another 40 years, manned Mars missions get pushed even farther into the distant future, and robotic planetary missions lose the momentum they had regained in the 1990s and 2000s. All for yet another stunt to show the world just how great the USA is. -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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May 4 2006, 11:49 AM
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1 |
QUOTE (ljk4-1 @ May 4 2006, 12:40 PM)  My concern is that the VSE is going to become Apollo Mark 2, where it takes away resources for real science missions just to put a few extra humans on the Moon for slightly longer stays. 'going to become' It's already happened. http://planetary.org/programs/projects/sos/ Doug |
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Toma B Fastest Spacecraft Ever?!? Jan 24 2006, 08:43 AM
ugordan QUOTE (Toma B @ Jan 24 2006, 09:43 AM)BUT REL... Jan 24 2006, 08:53 AM Alan Stern QUOTE (Toma B @ Jan 24 2006, 08:43 AM)There w... Jan 24 2006, 09:01 AM edstrick The fastest spacecraft ever, relative to what it... Jan 24 2006, 10:21 AM odave Here's a pointless activity for the space sim ... Jan 24 2006, 02:52 PM
ljk4-1 QUOTE (odave @ Jan 24 2006, 09:52 AM)Here... Jan 24 2006, 02:59 PM tasp I can't find the thread here right now, but th... Jan 24 2006, 03:15 PM ljk4-1 QUOTE (tasp @ Jan 24 2006, 10:15 AM)I can... Jan 24 2006, 03:24 PM ugordan QUOTE (ljk4-1 @ Jan 24 2006, 04:24 PM)Ho... Jan 24 2006, 03:47 PM RNeuhaus Ulysses still holds as the fastest escape velocity... Jan 24 2006, 03:57 PM Alan Stern QUOTE (RNeuhaus @ Jan 24 2006, 03:57 PM)Ulyss... Jan 24 2006, 06:23 PM PhilCo126 I guess it's pretty difficult to come up with ... Jan 24 2006, 05:12 PM remcook "I guess it's pretty difficult to come up... Jan 24 2006, 05:37 PM djellison Who's up for Top Trumps. I think Alan just won... Jan 24 2006, 08:53 PM BPCooper NH is fastest to be propelled away from Earth. The... Jan 24 2006, 09:14 PM Bob Shaw QUOTE (djellison @ Jan 24 2006, 09:53 PM)Who... Jan 24 2006, 11:06 PM David QUOTE (Bob Shaw @ Jan 24 2006, 11:06 PM)Not f... Jan 24 2006, 11:27 PM djellison My Estes two-stage Mongoose would shame an Atlas V... Jan 24 2006, 11:55 PM ljk4-1 Via Solar Array to the Outer Planets
New Scientis... May 2 2006, 06:18 PM djellison QUOTE (ljk4-1 @ May 2 2006, 06:18 PM... May 2 2006, 06:28 PM ljk4-1 QUOTE (djellison @ May 2 2006, 02:28 PM) ... May 2 2006, 06:34 PM Bill Harris ...but, as importantly, how long to decelerate fro... May 2 2006, 07:11 PM tty Also the payload would probably have to have some ... May 2 2006, 07:38 PM ugordan QUOTE (tty @ May 2 2006, 08:38 PM) Also t... May 8 2006, 04:04 PM dvandorn Yeah -- you'd end up with a pretty ragged, hol... May 2 2006, 08:12 PM ljk4-1 QUOTE (dvandorn @ May 2 2006, 04:12 PM) B... May 2 2006, 09:19 PM djellison QUOTE (ljk4-1 @ May 2 2006, 09:19 PM... May 2 2006, 10:08 PM Stephen QUOTE (ljk4-1 @ May 2 2006, 09:19 PM... May 3 2006, 01:41 AM Stephen QUOTE (ljk4-1 @ May 4 2006, 11:40 AM... May 5 2006, 06:56 AM ljk4-1 G. Landis had a similar idea to Meyer's one ye... May 8 2006, 02:54 PM djellison Well - consider a 1 gramme projectile at 10km/sec ... May 8 2006, 04:06 PM ugordan That's true, but consider what are the odds of... May 8 2006, 04:13 PM djellison I wasn't suggesting we would encounter 1 gramm... May 8 2006, 04:16 PM ugordan QUOTE (djellison @ May 8 2006, 05:16 PM) ... May 8 2006, 04:19 PM djellison Oop- yes
Doug May 8 2006, 04:23 PM DonPMitchell I believe it is the case that it takes far more en... May 10 2006, 10:37 PM mchan If one were not permitted to cheat and use one or ... May 11 2006, 01:49 AM Phil Stooke No, that would just be the method.
Phil May 11 2006, 03:18 AM mchan QUOTE (Phil Stooke @ May 10 2006, 08:18 P... May 11 2006, 08:41 PM Bob Shaw QUOTE (mchan @ May 11 2006, 09:41 PM) I h... May 11 2006, 09:23 PM djellison Yes - it seems unintuitive at first, but the numbe... May 11 2006, 07:46 AM edstrick "...square of the velocity...."
When we... May 11 2006, 11:03 AM |
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