One of the space junk, junk vehicles owned by the Russian Phobos-Grunt who failed to Phobos, is currently on the way down to Earth. Astronomers and the public waiting and anticipation, in which the vehicle will fall.

But apparently, Phobos-Grunt is not the only waste space and Earth are not the only ones threatened. There are about 15,000 of space junk and the International Space Station (ISS) is also one that is threatened.

ISS space junk that threatens is the fraction 251 or Iridium satellite Cosmos 133 satellite collision involved the year 2009. Size fraction was only 10 cm, but moves at breakneck speed, 28,000 miles per hour.

Astronomers Ma'rufin Sudibyo, Saturday (01/14/2012) says, "If you hit the ISS, will be able membolongi space station is in one of the vital, the keeper of the pressure."

The threat of space junk that forced NASA to power the booster rocket booster ISS for 54 seconds. ISS 1.5 kilometers higher appointed specifically to avoid this space junk. ISS is now there at an altitude of 391.4 kilometers from the Earth's surface.

Movement due to ISS space junk is the 13th time since 1998. Last movement is in September of 2010, where the astronauts took refuge in the Soyuz spacecraft that pass because there is garbage. Phobos-Grunt and the movement of the ISS to 13 times suggests that the problem of space junk is one issue that must be overcome.