TASK DEFINITION: You are given a sentence and your task is to generate another sentence that supports the given input.
PROBLEM: The light travel time for the most distant visible galaxies is several billion years, comparable to the age of the universe, so by studying distant galaxies we are also looking back in time.

SOLUTION: Due to the time it takes for light to reach us, galaxies at the edge of the universe are distant in terms of space and time.

PROBLEM: A &quot;vector&quot; can be defined as &quot;an organism that carries pathogens from one host to another.

SOLUTION: An organism that carries pathogens from one individual to another is called a vector.

PROBLEM: but when the earth s surface reradiates energy back to space, a significant portion of this thermal radiation is absorbed and reradiated by the atmosphere s CO 2 molecules back to the earth s surface, incrementally warming the planet.

SOLUTION:
Gases such as co2 and methane can trap thermal energy in earth's atmosphere before radiating it into space.