About 4.5 billion.
The surprising thing to me is how MANY extra-solar planets have been discovered. Considering the limitations of the Kepler Space Telescope's design, this indicates that there may be planets around a majority of the stars.
It's difficult or impossible to answer because planets have been discovered going round a few nearby stars, but the number of external solar systems could be very high.
How many years after Luther’s criticism did Galileo begin to study planets?
There is no known planet that has been lost from our solar system. All the planets in our solar system, from Mercury to Neptune, are still present in their respective orbits. Some dwarf planets beyond Neptune's orbit have been discovered in recent years, but no large planet has been lost.
Arcturus is a star located in the constellation of Boötes and is not known to have any planets orbiting around it. It is a red giant star that is relatively close to Earth in astronomical terms, at a distance of about 36.7 light-years. While exoplanets have been discovered around many other stars in our galaxy, none have been confirmed around Arcturus.
230
There are mountains on planets in space but there is no number on how many.
If you are talking about how many planets are in our solar system, the official count of them are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Pluto has been offcially named as a dwarf planet. If you are talking about how many planets are in ALL of space, there are trilllions, more than you can imagine.
10 Years
Pluto has not been able to pull any neighboring planets or space objects into rotation around it or, it has not "cleared" it's rotational path as Saturn crosses over Pluto's path every so many years.
There are a great many things that scientists and Science Fiction writers have been talking about. Some of the topics are space travel and life on other planets. Some speculate this life on other planets would be kind, others feel that this life would see us as food.
The surprising thing to me is how MANY extra-solar planets have been discovered. Considering the limitations of the Kepler Space Telescope's design, this indicates that there may be planets around a majority of the stars.
There are a great many things that scientists and science fiction writers have been talking about. Some of the topics are space travel and life on other planets. Some speculate this life on other planets would be kind, others feel that this life would see us as food.
There are many planets in our solar system that have not been visited by a spacecraft. As of now, the planet Uranus has not been visited by any spacecraft.
Space is wonderful place with many marvelous planets out there.
it was created by many stars and planets,and space
It's difficult or impossible to answer because planets have been discovered going round a few nearby stars, but the number of external solar systems could be very high.