It is bright everywhere. You have been able to travel around, and it's clear that you are not inside a star. Yet your surroundings seem as bright as looking directly at the Sun.
As you travel around, you notice that you cannot find a single neutral atom anywhere, nor can you find any nucleus besides those of hydrogen and helium. While it is hot (a few thousand degrees Kelvin), it is nowhere near the temperature needed for nuclear fusion. Where are you?
A) You are in the planetary nebula that the Sun will form about 5 billion years from now.
B) You are in an accretion disk around a supermassive black hole.
C) You are in the universe more than 10100 years in the future.
D) You are in the universe during its first 380,000 years.
E) You are in the central regions of a quasar.
Question 2
The Trojan asteroids are found
A) with the others, between Mars and Jupiter; their red color gives them their name.
B) orbiting around the Kuiper Belt body Hector.
C) sixty degrees ahead or behind Jupiter, sharing its orbit about the Sun.
D) beyond Neptune, with orbits similar to Pluto's.
E) closer on average to the Sun than is the Earth.
A plaque is a clear area in which all bacteria have been lysed by phages
Suzuki Harunobu, Two Courtesans, Inside and Outside the Display Window, Japanese.
Swab the inside of the wound.
A funnel helps in hearing if the electric fuel pump inside the gas tank is working.
How Far Did Your Food Travel?
Artist’s depiction of the view inside the uterus, showing a fetus connected by an umbilical cord ...