When I was a kid, in the 70's Spain, if something was american it was *good*. That perception sold cars, TV's,... and NASA was in part responsible of it.
It moves to take NASA out of the LEO ferry game, and keep it doing what it does best -- Exploration
NASA 40 years ago did some exploration, but since then everybody involved has retired. Nowadays NASA expertise is only LEO operations and it has to relearn how to "explore".
Since Apollo 15 all the misions were mainly scientific. The astronauts were taught how to pick and document the samples. Most of the astronauts were highly intelligent and motivated people and did a good job as amateur geologists.
Robots are cheaper but are also much less productive that astronauts. I remember to read that one of the controllers of Spirit and Opportunity said that they could do in a day what an astronaut could do in 45 seconds!!
An electric car that could be compared with a petrol car should have at least 100KW of power. The heater is only 2KW or 2% of the total power of the car.
"The MARSIS instrument was developed by the University of Rome 'La Sapienza', Italy, in partnership with NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, USA."
All the SMTP servers read your messages. It is part of the protocol!!
Also, most mail servers can be modified to analyze the messages (i.e. antivirus), extract statistics, even copying the messages. Your ISP could make a profile of you in the same way that gmail could.
There have been 15 deaths in more than 600 astronauts launched by the Shuttle. The probability of being killed in a Shuttle launch is less than the 3%.
Climbing the K2 is far more dangerous, about 50% of the people that tried to reach the summit died.
But the only thing this satellite can do is to rendezvous. DART can't repair Hubble nor survey the Shuttle. It is only a rendezvous demostration.
Russians mastered this technology decades ago and ESA is going to put it operation next year. However.
Neutron bombardment occurs inside the reactors making radioactive some stable elements. Also not all the radioactive elements are equally dangerous. Plutonium is obtained from uranium. There is not anything as a "Law of Conservation of Radioactivity".
Some years ago Carlo Rubia proposed to extract energy from Thorium (an stable element) by neutron bombardment. When you add a neutron to a nucleous of Thorium you make it instable. Then it fissionates getting anaother radioactive element which fissionates again and again until it converts in an stable nucleous. This could take seconds or centuries, I don't remember the details. Anyway during this process there is more radioactive mass (and activity) than before.
I think that a company can not afford to have all its documents in a closed format that only a buggy application can read. Word 2000 had problems to read files from Word97. What is going to happen in ten or twenty years?
I have few complains with MSOffice other than its closed file formats.
I am developing several projects for an european goverment. Currently all the documentation must be written in.DOC format because there is not a credible alternative.
I look forward for an open standard for documents so that I could use any compatible tool. Microsoft will be forced to support it since most of the goverments will adopt it. Perhaps I would keep using MSWord, but at least there would be a choice.
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Second MOM weighs in at 15 Kg, while MAVEN weighs in at 65 Kg.
Those weights are of the scientific payloads. MAVEN had a launch mass of 2500kg while MOM weighted 1300kg.
I was 2 months old, so I don't remember anything.
When I buy a book with DRM I remove it just after the purchase. I don't buy books with a DRM that I can not remove.
I have just read it and I agree. It is the most depressing book that I have read in a long time.
Only for the first minutes. Since Dragon is unmanned it hasn't vital support.
Wrong!! It depics a faked MARS landing.
When I was a kid, in the 70's Spain, if something was american it was *good*. That perception sold cars, TV's,... and NASA was in part responsible of it.
It moves to take NASA out of the LEO ferry game, and keep it doing what it does best -- Exploration
NASA 40 years ago did some exploration, but since then everybody involved has retired. Nowadays NASA expertise is only LEO operations and it has to relearn how to "explore".
Google dropped them?
You can try: http://www.google.com/search?q=direct+launcher
The first result is: http://www.launchcomplexmodels.com/Direct/what_is_direct.htm
Since the combination of Ares I a Ares V is so expensive that they are never to be built, a better alternative is needed:
http://www.directlauncher.com/
http://en.wikipedia.org/wiki/DIRECT
Yes. The density on liquid hydrogen is only 67 kg / m3, about 1/15 of water's
No, the Euro started at about 1,15 dollars. Since then it have fluctuated between 0,8 and 1,4.
Since Apollo 15 all the misions were mainly scientific. The astronauts were taught how to pick and document the samples. Most of the astronauts were highly intelligent and motivated people and did a good job as amateur geologists.
Robots are cheaper but are also much less productive that astronauts. I remember to read that one of the controllers of Spirit and Opportunity said that they could do in a day what an astronaut could do in 45 seconds!!
It is just the other way. The ship is heavier than air. It uses the forward motion to generate enough lift to fly.
An electric car that could be compared with a petrol car should have at least 100KW of power. The heater is only 2KW or 2% of the total power of the car.
"The MARSIS instrument was developed by the University of Rome 'La Sapienza', Italy, in partnership with NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, USA."
All the SMTP servers read your messages. It is part of the protocol!! Also, most mail servers can be modified to analyze the messages (i.e. antivirus), extract statistics, even copying the messages. Your ISP could make a profile of you in the same way that gmail could.
There have been 15 deaths in more than 600 astronauts launched by the Shuttle. The probability of being killed in a Shuttle launch is less than the 3%. Climbing the K2 is far more dangerous, about 50% of the people that tried to reach the summit died.
But the only thing this satellite can do is to rendezvous. DART can't repair Hubble nor survey the Shuttle. It is only a rendezvous demostration. Russians mastered this technology decades ago and ESA is going to put it operation next year. However.
That would be true if you do not take into account the amortization of the inversion. How long these panels last?
Some years ago Carlo Rubia proposed to extract energy from Thorium (an stable element) by neutron bombardment. When you add a neutron to a nucleous of Thorium you make it instable. Then it fissionates getting anaother radioactive element which fissionates again and again until it converts in an stable nucleous. This could take seconds or centuries, I don't remember the details. Anyway during this process there is more radioactive mass (and activity) than before.
That is not true. You can get radioactive material by neutron bombardment of non-radioactive elements. Please google for "ARTIFICIAL RADIOACTIVITY".
I have few complains with MSOffice other than its closed file formats.
I am developing several projects for an european goverment. Currently all the documentation must be written in .DOC format because there is not a credible alternative.
I look forward for an open standard for documents so that I could use any compatible tool. Microsoft will be forced to support it since most of the goverments will adopt it. Perhaps I would keep using MSWord, but at least there would be a choice.