New Mars Forums

Yet another two, maybe more easy than the former two of my:

1. Has Latvia ever sent a cosmonaut? What's his name? (Tip: Think about that female euronaut)

2. Who were the first that experienced artificial gravity in space?

Donald (Deke) Slayton

BTW: Luna and Lunik are the same names.

It's also surprising that the cosmonauts seem to be less hierarchic than the astronauts. Maybe communism does really work in spaceflight.

I've an arithmetic problem for many many years. It's the following:

Consider a natural number (not 0), call it n(i). If it's odd, then : n(i+1)=3*n(i)+1
Of it's even, then n(i+1)=n(i)/2

Continuing this, I'm nearly sure every natural number will end to 1. Try it with eg 27 (without calculator!!!).

But can I prove this? I'm trying for years. I have proven that every number will lead to a number expressed as x+4 where x is a 6-time number, except binary numbers (1,2,4,8,16,eg). When proving that every x+4 number leads to 1, we're there.

But intuition says, it shall turn out to be a proof as follow:
First proove that by doing this no number will return to itself (except 1,2 and 4)
Then proove no number will reach another number that is a certain amount bigger than the number you start with.

In that case it must follow every number will reach 1.

Another possibility is show it for 2 and proove that it works for some n+1 if it works for n.

Any ideas? :band:

These doubts were there from the beginning. I never thought ALH84001 contained fossils or was even Martian.

1. How can Martian vulcanic rock be 'launched' in space?

2. How can one accordance the PAC's in ALH84001 with the absence of it on Mars, according to Vikings gas-analysator?

3. Structures seem to be to small to suggest bacterians, because they couldn't contain the organels.

4. How can you definitely exclude earth-life contamination?

Yes, flying Dutchman to Titan!!! :;):

Last time somebody posted some numbers of specific masses on a thread. I was looking for tht and reacted. It was really off-topic in that thread, so yet I can´t found. It was about specific masses and efficiency  of solar panels.

Who can help?

Thank you very much!

If I´m right, some solutions can be complex. Is that right?

The physiological reactions to stress, depression, anxiety, and so on are well-known, even described by statistics. Persons differ really in that respect. Biological factors contribute to these differences, but also the earliest experiences in life.

Astronauts should be selected on such criteria to dangerous situations. When somebody is 40 years old it's quite simple to check his history to know he is more likely to react strongly in psychologic terms.

On the other hand, psychological risk-factors should not made more difficult than is necessary. That's one of the reasons I prefer to make an opposition-class mission to limit the time in interplanatary space. The amount of stress this will bring is hard to predict. For further missions we can learn from this and design conjunction-class missions.

The numbers I calculated which, I think, are the best.

Optimization only involves injection delta-V, because at Mars aerobraking is used. I is directed to first point of Aries, J is rectangular on I in prograde direction in the ecliptical plane and K is rectangular to the plane.

Depart date from earth: march 19, 2016
Arrival at Mars: jan. 20, 2017

Vector of depart (million km):
-148.988I +0.135J
Velocity (km/s):
-0.5113I -29.9007J

Vector of arrival (million km):
+189.540I +97.912J -2.597K
Velocity (km/s):
-10.2037I +23.6014J +.7379K

Travel time is 307 days, angle around sun 207.4 degrees.

Hyperbolic departure velocity:
+0.2500I -2.6799J +0.8627K    abs: 2.826 km/s
Hyperbolic arrival velocity:
-2.5787I -4.5943J -1.2409K     abs: 5.413 km/s

Moving departure and/or arrival dates results in more hyperbolic departure delta-v.

The precision of the numbers is too much. I used this precision to avoid loss of significance due to much calculating during the process.

(Sorry, I thought I had this posted earlier, but I'm not sure.)

RSA and ESA are building a launch-site for Soyuz-rockets in Kourou. As far as I know for unmanned rockets only, but who knows....

When a Soyuz is launched from this site, where would it land? Soyuz lands on the land, but can eventually land on the water (this has happened once). When a Soyuz flies in a 28degree orbit (Hubble-repair mission?) it could land on the following places, I think:

1. Northern Australia
2. Northern Namibia
3. Oman
4. Mali/Senegal

All other sites are to difficult to trreach by recovery, to dense crowded or belong to nations with political problems. But maybe I've seen something not, maybe some of this sites are problematic as well.

Anybody suggestions?

I read somewhere NASA is thinking about a drug that lowers the sexual urge. Sexual urge is considerred as a real problem by some scientists. The biggest problem should be jealouzy (right writing of this word ??? ).

They write also in the article about Svetlana Savitskaya who has made love in space, but they consider it as not right. However, I'm sure it's right, because some member of the MS who visited the Russians met the male cosmonaut that was involved. (Alexandr Serebrov). But officially, nothing has happened.

May choice is 'sex should be forbidden'' , but I'm not sure. I'm not sure if it's a real problem. Psychologically, the problem of jealouzy makes sense.

Drugs: Don't think it's a good idea, it has of course side-effects. And what when thes drugs are refused? Beside that I think it's not ethical.

Only women, men or married couples: Not practical to narrow your selection criteria.