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A few thousand exoplanets have been discovered so far; according to the Wikipedia article on "Exoplanet": "As of 1 March 2017, a total of 3,586 confirmed exoplanets are listed in the Extrasolar Planets Encyclopaedia".The Wikipedia article "List of exoplanets" has a list of such exoplanets.
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What was the first planetary moon to be discovered?
Earth's moon would have been the first moon discovered. Galileo observations identified four of Jupiter's moons - Io, Europa, Ganymede, Callisto - in 1610.
When did solar energy get invented?
Solar energy was never invented but rather it was discovered. Solar energy was first discovered in 1876 as a resource that was renewable.
What year was the sun discovered in?
The sun has not been "discovered" in a specific year as it has been observed and known about for thousands of years by various cultures. The sun is a vital part of our solar system and has been studied extensively by astronomers and scientists.
When is the moons birthday?
The moon does not have a birthday, as it is a natural satellite that has been orbiting Earth for billions of years. Its formation was a result of a planetary collision early in the solar system's history.
What do astronomers think about the possibility of planets orbiting other stars and being detected?
Astronomers believe that planets orbiting other stars, known as exoplanets, are common in the universe. They have been detected using various methods such as the transit method and radial velocity method. The discovery of exoplanets has greatly expanded our understanding of planetary systems beyond our own.
Where Astronomers expect to find planetary system?
Anywhere there are stars. Hundreds of planets have already been discovered outside our own Solar System.
How many planets can a solar system have according to the nebular theory?
There is no maximum number, and "nebular theory" has been knocked for a loop by the recent discoveries of 400+ "extra-solar planets" - planets orbiting other stars. Classical theories predicted that planetary systems would be rare; however, it seems that every nearby star we've looked at recently has been discovered to have planets - LOTS of planets.
How many solar systems have been found?
As of now, astronomers have discovered thousands of solar systems beyond our own Milky Way galaxy. These exoplanetary systems vary in size, composition, and configuration, and play a vital role in expanding our understanding of the diversity of planetary systems in the universe.
What was surprising about the extrasolar planets that were discovered?
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.
What planet has one day is equal to 21 hours?
A search of the planetary characteristics in the TIME Almanac 2009, pp.139-154, fails to find any planet in the solar system with such a rotational period. Although strong evidence for extra-solar planets has been observed, none of their rotational periods has been measured.
How many confirmed extra solar planets have been up to date?
As of October 2023, there are over 5,400 confirmed exoplanets discovered in more than 3,900 planetary systems. This number continues to grow as new discoveries are made through various methods, including transit observations and radial velocity measurements. The Kepler Space Telescope and other missions have significantly contributed to this tally, enhancing our understanding of the diversity of planetary systems beyond our own.
What was the first planetary moon to be discovered?
Earth's moon would have been the first moon discovered. Galileo observations identified four of Jupiter's moons - Io, Europa, Ganymede, Callisto - in 1610.
Is neptune hottest or the coldest planet in the solar system?
Neptune has an average temperature of -200C, making it the coldest planet in the solar system (at least now that Pluto has been demoted from planetary status).
Are there some planets that are not in the solar system?
Yes, there are planets outside our solar system known as exoplanets. These planets orbit stars other than the Sun. Thousands of exoplanets have been discovered so far using various techniques like the transit method and radial velocity method.
How many astroids have been discovered?
As of September 2021, over 1 million asteroids have been discovered in our solar system. However, it is estimated that there are millions more that have not yet been detected.
What are the moons are on mercury?
No natural satellites have been discovered in orbit around Mercury. Planetary scientists are by now quite firmly convinced that the planet has no moons.
Is there any other life in your solar system?
At least, none has been discovered so far.
