system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If gravity is always pulling everything closer how is the universe constantly expanding?
gpt
Short answer is that we dont actually know. All we know is that everything in the universe is red shifting and the rate of the expansion is increasing. Currently we just chalk it up to dark energy, but we have no idea what this dark energy actually is, what produces it, where it is, if it exist, or how to measure it.