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Most exoplanets are large gas giants, one of those is the largest known planet in the galaxy. If you meant the solar system, then the largest planet is Jupiter.
The extrasolar planets discovered so far most resemble those in our own solar system, including rocky planets, ice giants, and gas giants. However, there is a wide variety of exoplanets with unique characteristics that differ from those we find in our 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.
Not all gas giant planets have low temperatures (most exoplanets are hot "jupiters"). In our solar system the relatively low temperature are a result of the distance they are from the Sun.
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Radial Velocity (AKA Doppler Shift)
Not in the lifetime of anyone alive today. With current technology, any spacecraft we launch would take hundreds of thousands of years to reach the nearest exoplanets, most of which cannot support human life.
The majority of the angular momentum of the solar system is found within the orbital motion of the planets around the Sun. This motion results in the spinning of the planets on their axes and the overall rotation of the solar system as a whole.
Jupiter, because it is the most massive planet, 318 times the mass of the Earth.in our solar system Jupiter has the most gravity.In our solar system, Jupiter.But they've found bigger planets around other stars.
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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.
Some may be, but most found so far are not Earth-like. Also, no life forms have been found yet. Currently we do not have the technology that would allow us to determine whether an exoplanet has life.