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The plains of Pluto, as seen by New Horizons after its nearly 10-year voyage Remotely guided have flown by all of the planets of the Solar System from Mercury to Neptune, with the probe having flown by the dwarf planet and the currently orbiting the dwarf planet. The most distant spacecrafts, and have left the Solar System as of 8 December 2018 while,, and are on course to leave it. In general, planetary orbiters and landers return much more detailed and comprehensive information than fly-by missions. Space probes have been placed into orbit around all the five planets known to the ancients: first (, 1971), then (, 1975; but landings on Venus and atmospheric probes were performed even earlier), (, 1995), (, 2004), and most recently (, March 2011), and have returned data about these bodies and their. The mission in 2000 orbited the large near-Earth asteroid, and was even successfully landed there, though it had not been designed with this maneuver in mind. The Japanese spacecraft in 2005 also orbited the small, landing on it briefly and returning grains of its surface material to Earth. Another powerful ion-drive mission,, has orbited the large asteroid (July 2011 – September 2012) and later moved on to the dwarf planet, arriving in March 2015.

Remotely controlled landers such as, and the two have landed on the surface of Mars and several and spacecraft have landed on the surface of Venus. The successfully landed on Saturn's moon,. No manned missions have been sent to any planet of the Solar System. 's, however, landed twelve people on the and returned them to. The American, originally introduced by President and put into practice through the, had as a long-term goal to eventually send human astronauts to Mars.

However, on February 1, 2010, President Barack Obama proposed cancelling the program in Fiscal Year 2011. An earlier project which received some significant planning by NASA included a manned fly-by of Venus in the mission, but was cancelled when the was terminated due to NASA budget cuts in the late 1960s.

Nba 2k12 ntsc ps2 isos. Reasons for interplanetary travel [ ]. Space colony The costs and risk of interplanetary travel receive a lot of publicity — spectacular examples include the malfunctions or complete failures of unmanned probes such as, and (the article gives a full list).

Many astronomers, geologists and biologists believe that exploration of the Solar System provides knowledge that could not be gained by observations from Earth's surface or from orbit around Earth. But they disagree about whether manned missions make a useful scientific contribution — some think robotic probes are cheaper and safer, while others argue that either astronauts advised by Earth-based scientists, or spacefaring scientists advised by Earth-based scientists, can respond more flexibly and intelligently to new or unexpected features of the region they are exploring. Those who pay for such missions (primarily in the public sector) are more likely to be interested in benefits for themselves or for the human race as a whole.

So far the only benefits of this type have been 'spin-off' technologies which were developed for space missions and then were found to be at least as useful in other activities ( publicizes spin-offs from its activities). Other practical motivations for interplanetary travel are more speculative, because our current technologies are not yet advanced enough to support test projects. But writers have a fairly good track record in predicting future technologies — for example () and many aspects of computer technology (). Many science fiction stories (notably 's stories) feature detailed descriptions of how people could extract minerals from and energy from sources including orbital (unhampered by clouds) and the very strong of Jupiter. Some point out that such techniques may be the only way to provide rising standards of living without being stopped by pollution or by depletion of Earth's resources (for example ). Finally, colonizing other parts of the Solar System would prevent the whole human species from being exterminated by any one of a number of possible events (see ).

One of these possible events is an like the one which may have resulted in the. Although various projects monitor the Solar System for objects that might come dangerously close to Earth, current are crude and untested. To make the task more difficult, are rather sooty and therefore very hard to detect. Although carbonaceous chondrites are thought to be rare, some are very large and the suspected ' may have been a carbonaceous chondrite. Some scientists, including members of the, argue that the vast majority of mankind eventually will live in space and will benefit from doing this.