The steps in which the large, outer planets formed were
accretion of planetesimals to form a core, followed by gravitational capture of hydrogen and helium gas.
In order of increasing density, the large, outer planets would be listed as
Saturn, Uranus, Jupiter, and Neptune
In our solar system, which of the following planets is NOT a member of the terrestrial group?
What name is given to the concentration of mass that formed at the center of the solar nebula, and eventually became the Sun?
The most likely mechanism for the solar system is that
the Sun and planets slowly condensed to their present form from a gas and dust cloud.
At what point in time do we say that the protosun became the Sun?
C) When thermonuclear fusion reactions began at its center.
The birthplace of the Sun and planets (and of other stars and maybe their planets) is thought to have been
in cool gas and dust clouds
Where in the universe are heavy elements, with masses greater than that of helium, being produced at this time?
In the central cores of stars
The correct sequence of planets in our solar system, from the Sun outward, is
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
The manner in which the terrestrial planets formed was
accretion of solid planetesimals containing mostly rocky material.
The overall shape of the orbits of most of the planets in the solar system is
slightly elliptical but nearly circular
Compared to the orbital distance of Earth from the Sun, the equivalent orbital distances for the outer planets are
greater than 5 times