In comparing our own solar system with others found to date, we find:
A)most orbits are less circular than the orbits of planets around our Sun.
B)jovians often lie much closer to their suns than ours do.
C)multiple planets are found in some systems.
D)hot Jupiters, even closer to their stars than Mercury is to our Sun.
E)all of the above.

Question

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A) Most orbits are less circular than the orbits of planets around our Sun. This has been observed in many other solar systems, where the eccentricity of the orbits is much higher than that of our own solar system.
B) Jovians often lie much closer to their suns than ours do. This is also observed in many other solar systems, where gas giants are found orbiting very close to their host stars in what is known as the "hot Jupiter" phenomenon.
C) Multiple planets are found in some systems. This has been observed in many other solar systems, with some systems having multiple planets in close proximity to each other.
D) Hot Jupiters, even closer to their stars than Mercury is to our Sun. This is another aspect of the "hot Jupiter" phenomenon, where gas giants orbit very close to their host stars, often with extremely short orbital periods. A) The orbits of planets around other stars tend to be more eccentric (less circular) than those in our solar system.
B) Many exoplanets, especially gas giants like Jupiter, have been found orbiting very close to their star, even closer than Mercury orbits our Sun.
C) Multiple planets have been found orbiting other stars, and some of these systems have more planets than our own solar system.
D) Hot Jupiters, gas giant planets that orbit very close to their star, have been discovered in other star systems.

In Comparing Our Own Solar System with Others Found to Date