Discuss why astronomers no longer consider Pluto a planet
What will be an ideal response?
A bit of comparative planetology shows that Pluto is not related to the Jovian or Terrestrial planets; it is obviously a member of a newfound family of worlds that orbit beyond Neptune. These bodies must have formed at about the same time as the eight classical planets of the Solar System, but they did not grow massive enough to clear their orbital zones of remnant planetesimals and consequently remain embedded among a swarm of other objects in the Kuiper Belt.
You might also like to view...
What is the giant impact hypothesis for the origin of the Moon?
A) The Moon formed from material blasted out of the Earth's mantle and crust by the impact of a Mars-size object. B) The Moon formed when two gigantic asteroids collided with one another. C) The Moon originally was about the same size as Earth, but a giant impact blasted most of it away so that it ended up much smaller than Earth. D) The Moon formed just like the Earth, from accretion in the solar nebula.
What is the importance of the fact that methane has a chemical formula CH4, while coal has a chemical formula approximately CH0.8?
What will be an ideal response?
The mass of a proton is 1.6726 × 10-27 kg and the mass of a neutron is 1.6606 × 10-27 kg. A proton captures a neutron forming a deuterium nucleus. One would expect the mass of this nucleus to be
A) equal to (1.6726 + 1.6606 ) × 10-27 kg. B) less than (1.6726 + 1.6606 ) × 10-27 kg. C) greater than (1.6726 + 1.6606 ) × 10-27 kg.
which of the following stars lives the longest life?
What will be an ideal response?