Based on our current knowledge of the motions of Uranus and Neptune, it is obvious that Pluto's discovery was a triumph of physics, on par with Adams and Leverrier's work in finding Neptune.
Indicate whether the statement is true or false
Question 2
You find yourself in a very low-density gas that is extremely hot. In fact, the temperature of the gas is so high that it is emitting lots of X-rays.
There are no stars anywhere within about 10,000 light-years of you, but at slightly greater distances, your sky is brightened by hundreds (perhaps thousands) of beautiful, star-filled structures, some with majestic spiral shapes. Where are you?
A) You are in the universe about 380,000 years after the Big Bang when the cosmic microwave background radiation was formed.
B) You are in intergalactic space within a rich cluster of thousands of galaxies.
C) You are in the center of the Milky Way Galaxy, looking outward into the Local Group.
D) You are in the universe when it was about 500 million years old, just before galaxies began to form.
E) You are in the outskirts of a galaxy whose nucleus is a powerful quasar.
Chemosynthesis-based community on the East Pacific Rise.
Crescent Uranus as imaged by Voyager 2 while departing for Neptune
Primary School Attendance in World Regions Attending primary school is common but not universal, wo
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Current intensity and the frequency of action potentials