today I want to do a short rewrite of some posts from NASA page about things happening lately in space, simply to understand and remember them better, makes sense huh?
I have got three things, Van Allen Probes, OSIRIS-REx and Juno (I am saving that one as last since it is simply best).
Van Allen Probes are two satellites orbiting Earth in 9 hour intervals (2 000 miles per second). They celebrated their 5th year anniversary. Such a satellite must be hardened against radiation, otherwise the high energetic particles would destroy its electronics. Throughout its life, it discovered for example that there can be 3rd radiation belt around the Earth.
I already wrote about OSIRIS-Rex before. It is rare mission, first of its kind because it will optimally return samples of the asteroid Bennu back to Earth. On September 22nd, it will pass couple thousand kilometers above Earth that will speed it up so that it does not have to use so much fuel. They had to make sure that the spacecraft does not hit some other satellite that is in the Earth’s orbit, it would be quite sad if this couple hundred-million-dollar project failed even before the landing (I guess it must be in this magnitude).
If you read my blog you know about the spacecraft Juno and that it got close to Jupiter (and started the mission after the long flight). I guess I do not need to say anything when I share those (color enhanced) pictures from the eight-close approach.
Sources are just those three NASA pages.
one of arguments by hoaxers is that astronauts would never be able to pass Van Allen radiation belts.
First of all, what are the radiation belts.
Those are belts around whole planet created by interaction of Earth`s magnetosphere and solar wind.
Solar wind is flow of energetic particles from Sun. Those belts were first discovered by James Van Allen.
There are two parts of them. Outer belt which is less dangerous and inner belt where is much more charged particles and especially protons.
It was also proved that there is antimatter in those belts but it is just such a low amount that we would not be able to use it anyway.
Well so hoaxers made up that if human being tried to cross this radiation belt it would kill him. The problem is that it would not, if he went fast enough.
Van Allen`s radiation belts are not stationary which means that there are days when there is more radiation and days when there is less.
Quess when NASA wanted Apollo to fly, huh?
So Apollo 11 went in angle of 30° from equator where the concetration of charged particles was smallest.
The fatal dose of radiation is 1000 rads while the astronauts got from the most dangerous part about 26 rads, which they survived.
This site more deeply explains it.
Most of the charged particles would not be even able to penetrate the space craft. Those which would, would give astronauts a dose about 50mSv. Which is something but it even counts with “higher” number of protons to not going through but all of them shooting the body.
The dosimeters you can check here.