prompt: Explain the concept of dark energy and its connection to the expansion of the universe.
chosen.role: system
chosen.content: A chat.
chosen.role: user
chosen.content: Explain the concept of dark energy and its connection to the expansion of the universe.
chosen.role: assistant
chosen.content: Dark energy is a hypothetical form of energy that is believed to permeate the entire universe uniformly. It is considered to be responsible for the accelerated expansion of the universe. Unlike dark matter, dark energy does not interact with matter or electromagnetic radiation, making it difficult to detect. The concept of dark energy emerged from observations of distant supernovae in the late 1990s and is estimated to account for between around 68% to 72% of the universe's total energy.
rejected.role: system
rejected.content: A chat.
rejected.role: user
rejected.content: Explain the concept of dark energy and its connection to the expansion of the universe.
rejected.role: assistant