This question is being awnswered in 2014 so it is as of 2014.1,653 dumbhead.
As of June 1, 2017, 3610 confirmed exoplanets, according to the Wikipedia article. Note that there are many more which may well be exoplanets, but where the evidence is not strong enough.
Now we know of 861 exoplanets, with several thousand awaiting confirmation
about like 200 something like that
We know now that planets are a fairly common occurrence in the universe. This discovery provides many potential opportunities for life to exist beyond Earth.
Astronomers used to consider that Pluto was a planet and have now stated it is just one of many objects in the Kuiper Belt. The Kuiper Belt is made of the leftovers in the creation of the Solar System.
No, although it is difficult to spot exoplanets, so only the larger ones are often found. Most systems with identified planets most likely have many other smaller planets that we cant detect. A planet the size of Earth or Mercury is nearly impossible to detect with current technology.
Now we know of 861 exoplanets, with several thousand awaiting confirmation
about 403.
We hardly know yet. Planets other than those in our own solar system (called "extrasolar" planets or "exoplanets") have only been discovered in the last ten years or so. About a thousand are known, but astronomers feel there must be many, many more.
There are 8 planets within our solar system. They are:MercuryVenusEarthMarsJupiterSaturnUranusNeptuneOutside of our Solar System, there are possibly billions, although as of Aug 2010, only 490 exoplanets have been found - but this number is increasing almost daily.See related link for a current list of exoplanets.
Earth is one of many planets. There are 8 planets in our own solar system and over 400 exoplanets found so far.
The Type of Economic System that is found in many European countries is a Traditional economy
88 constellations are recognized by astronomers.
Astronomers typically work eight hours a day.
There are many exoplanets that have been discovered during the last 12 years. See the sources and related links below for Wikipedia's article on exoplanetary systems. Most were found this millennium.
many european explorers tried to find a trade route 2 asia, but many of them, well most of them never found it
Many... one recent one is NASA found possible arsenic based lifeforms; Astronomers find a planet with a core of diamond;
Billions. (rounded)