International Space Station - NASA
A decade ago, two Russian cosmonauts and an American astronaut became the first humans to move into the International Space Station. For four and a half months, the station was their home. Their time there was known as Expedition 1, and was the first of the 25 expeditions that there have been up until now. The International Space Station, or ISS, has been continuously inhabited since that first expedition on November 2nd, 2000, and has recently broken the record for the longest uninterrupted human presence in space. (The previous record had been held by the Russian space station, Mir, with an impressive 3,644 days.)
Not only that, the International Space Station just travelled its 1.5 billionth mile at the start of November.
Yet despite its huge achievements in the name of human ingenuity, many would argue the space station has been a waste of money, resources and time.
Originally designed to host a huge range of scientific experiments, gradually as the years have dragged on, the research has had to be scaled back, allowing for the budget to cover the amount needed just to complete the construction of the ISS.
At present, £62billion has been spent on the project – making it the most expensive object ever built.
Posted in Astronomy
Tagged ISS, NASA, space
A new method for detecting exoplanets has been successfully used for the first time. The technology, which was installed on the European Southern Observatory’s Very Large Telescope (VLT), has provided images of a planetary system previously invisible to astronomers.
The technology, known as an Apodizing Phase Plate (APP), works by blocking out the light from the star you’re interested in, thus revealing the objects that orbit it most closely. The APP is basically a small piece of patterned glass which sits on the lens to refract the light waves in such a way that they interfere with each other.
Previously, planet’s that have been detected using direct methods, i.e. when the planet itself can be imaged, had to have huge orbits taking them massive distances away from their parent star. Now, by blocking out the glare of the star, planets on much closer orbits can be observed.
This is one of the great examples of why astronomy is cool.
The photograph was taken earlier this month using the Solar Dynamic Observatory (SDO), and shows the moon transiting the Sun in a pretty spectacular way.
Unfortunately, the only one to see it was the un-manned SDO satellite. Fortunately, it snapped a couple of photos for all of us.
The satellite orbits the Earth at a distance of 36,000km, and so was perfectly placed to witness the partial eclipse.
NASA have also released a movie of the transit which is pretty cool. It even shows the Sun’s rotation. Definitely worth a look.
Two weeks ago, we learned of an exciting new discovery in our galaxy. The first sign of a possible Goldilocks planet orbiting one of our closest stellar neighbours. Not too hot and not too cold, with the possibility of liquid water, Gliese 581g was the sixth planet found to be orbiting the nearby star. The planet was reported to be three times larger than the Earth, sitting in a tidally locked orbit right in the middle of the habitable zone.
Today, Mars has an almost non-existent atmosphere. Just a few heavier molecules that are clung on to by the planet’s weak gravity. Nothing even close to what we so deeply rely upon here on Earth. But, we now know that this may not have always been the case. Following the planet’s turbulent formation, an atmosphere would have existed, and possibly even liquid water. But alas, the red planet was not quite massive enough to hold onto whatever atmosphere it had, and gradually it drifted away into space; first the hydrogen, then the helium, and then the rest, taking along with it any indications of what may have been.