Choose a background or upload your own photo, then download a shareable quote image.
Your file stays in the browser; nothing is sent to the server.
Choose a background or upload your own photo, then download a shareable quote image.
The existence of dark matter and dark energy are inferred from observations! They are not theoretical constructs. Though invisible, both reveal their presence through the effects that they exert on motions of celestial bodies and in the case of dark matter - the bending of light as well.