So far dark matter and dark energy are 100% invisible. They are called dark because they are unseen. They are hypothetical.
Dark matter is inferred to exist because there is not enough normal matter to explain the gravity effecting some galaxies.
Dark energy is inferred because the expansion of the entire universe is accelerating much faster than can otherwise be explained.
soundsthatwormsmake t1_ja7rtut wrote
Reply to comment by Poise-on in How to make a model of dark matter and energy? by Poise-on
So far dark matter and dark energy are 100% invisible. They are called dark because they are unseen. They are hypothetical. Dark matter is inferred to exist because there is not enough normal matter to explain the gravity effecting some galaxies. Dark energy is inferred because the expansion of the entire universe is accelerating much faster than can otherwise be explained.