Space

Following on from Crew Tether Spin - With Final Stage - On Routine Mission To ISS - First Human Test Of Artificial Gravity?, I've got some great videos to share now, showing the Soyuz and final stage spinning to create artificial gravity, over the turning Earth, against the stars. So, let's take a look at the highlights of the mission in video, ready for the Space Show webinar on artificial gravity.

First, launch sequence, if you haven't seen it yet

SETI scientist Gerry Harp writes of a "secret" experiment involving Kepler 186-f.   The senior scientist look only for a tuning fork like signal.  The least likely signal ET would send. Real signs of ET intelligence will be, and if I am correct are in fact, much fainter and on a broad band like channel.  A serious scientific search should not attempt to rely only on radio data, or look only for a strictly monochromatic, one frequency, radio signal.
You may remember, a while back I talked about Joe Carroll's ingenious idea to do our first ever true experiment in a gravity tether during a routine Soyuz crew transfer to the ISS, His idea is to use the third stage -which goes into orbit anyway, as the counterweight. Remarkably, the whole thing, even including the spin up to create artificial gravity, uses almost no extra fuel over a normal mission to the ISS. This could help with numerous health issues of zero g. 

Images of Saturn's auroras as the planet's magnetic field is battered by charged particles from the Sun have led a team to claim decisive evidence for the hypothesis that Saturn's auroral displays are often caused by the dramatic collapse of its "magnetic tail".

Just like comets, planets such as Saturn and the Earth have a "tail" – known as the magnetotail – that is made up of electrified gas from the Sun and flows out in the planet's wake.

When a particularly strong burst of particles from the Sun hits Saturn, it can cause the magnetotail to collapse, with the ensuing disturbance of the planet's magnetic field resulting in spectacular auroral displays. A very similar process happens here on Earth.


Elon Musk's ideas are in the news right now, rockets with first stages that fly back to a soft landing under auto pilot. But you might be surprised to learn how many other ideas there are under active development, for low cost ways to get into orbit.

The British Skylon would fly directly into space from a reinforced airport, taking off like a plane, without need to discard anything (single stage to orbit). Then JP Aerospace plan airships to float up to 200,000 feet followed by transfer to a lighter than gossamer skinned, "orbital airship" that never lands, but can accelerate gradually through the near vacuum of the troposphere and above, to orbital velocities.

Last year, people began wondering why part of the sun was missing.  What had happened was that changes to the magnetic field were allowing hot plasma to fly off into space toward Earth, creating a coronal hole.

Coronal holes are actually happening less right now, because we are experiencing a solar maximum. During this portion of the recurring cycle, the number of coronal holes decreases. During solar max, the magnetic fields on the sun reverse and new coronal holes appear near the poles with the opposite magnetic alignment.

The astronomer Giovanni Schiaparelli first described them as 'canali' in the 19th century. A conspicuous net-like system of deep gorges known as the Noctis Labyrinthus is clearly visible on Mars' equatorial region.

The gorge system, in turn, leads into another massive canyon, the Valles Marineris, which is 4,000 km long, 200 km wide and 7 km deep. Both of these together would span the US completely from east to west.

These gorges resemble terrestrial canyons formed by water so most researchers assumed that immense flows of water must have carved the Noctis Labyrinthus and the Valles Marineris into the surface of Mars. Or perhaps tectonic activity had created the largest rift valley on a planet in our solar system.


One of the most fascinating nearby planetary systems, 55 Cancri, is now less mysterious.

Hopefully. The authors say theirs is the first viable model for  the planetary system of 55 Cancri, one the first stars discovered to have planets.

Numerous studies since 2002 had failed to determine a plausible model for the masses and orbits of two giant planets located closer to 55 Cancri than Mercury is to our Sun. Astronomers had struggled to understand how these massive planets orbiting so close to their star could avoid a catastrophe such as one planet being flung into the star, or the two planets colliding with each other.

A newly discovered "hypervelocity star" is the closest, second-brightest and among the largest found so far. It is speeding at more than 1 million mph and may provide clues about the supermassive black hole at the center of our Milky Way. Also, add in the obligatory "dark matter" reference.

Hypervelocity stars appear to be remaining pairs of binary stars that once orbited each other and got too close to the supermassive black hole at the galaxy's center. Intense gravity from the black hole – which has the mass of 4 million stars like our sun – captures one star so it orbits the hole closely, and slingshots the other on a trajectory headed beyond the galaxy.


Astronomers have made a measurement of a distant neutron star that is one million times more precise than the previous world's best - and they did it by using...nothing.

The interstellar medium is the 'empty' space between stars and galaxies. It's not really empty, it is made up of sparsely spread charged particles and those can be used as a giant lens. The astronomers did just that, to magnify and look closely at the radio wave emission from a small rotating neutron star.

Result: the highest resolution measurement ever achieved, equivalent to being able to see the double-helix structure of our genes from the Moon.