Dark Matter & Dark Energy - NASA Science
Matter is defined as any substance that has mass and occupies space. But there’s more to the universe than the matter we can see. Dark matter and dark energy are mysterious substances that affect and shape the cosmos, and scientists are still trying to figure them out.
Dark matter | Definition, Discovery, Distribution, & Facts - Britannica
2024年12月18日 · dark matter, a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity. Dark matter makes up 30.1 percent of the matter -energy composition of the universe; the rest is dark energy (69.4 percent) and “ordinary” visible matter (0.5 percent).
Dark matter - Wikipedia
In astronomy, dark matter is a hypothetical form of matter that does not interact with light or other electromagnetic radiation. Dark matter is implied by gravitational effects which cannot be explained by general relativity unless more matter is present than can be observed.
What Is Dark Matter? | NASA Space Place – NASA Science for Kids
2024年12月5日 · Dark matter is that invisible glue that keeps stars, dust, and gas together in a galaxy. This mysterious substance makes up the majority of a galaxy's mass and forms the foundation of our Universe's structure. Dark matter is still one of the greatest mysteries of science. Credit: NASA/JPL-Caltech.
Dark Matter - NASA Science
Scientists are trying to determine what dark matter is made of, but our current understanding has many gaps. Roman will provide clarity by exploring the structure and distribution of both normal matter and dark matter across space and time.
Dark matter - CERN
Dark matter seems to outweigh visible matter roughly six to one, making up about 27% of the universe. Here's a sobering fact: The matter we know and that makes up all stars and galaxies only accounts for 5% of the content of the universe! But what is dark matter?
What is dark matter? - Live Science
2020年9月22日 · Dark matter is a mysterious non-luminous substance making up the vast majority of matter in the universe. Though experts have observed the gravitational effects of dark matter for...
Dark Matter 101: Looking for the Missing Mass - NASA Science
2018年12月6日 · Every image only shows ordinary matter (scientists sometimes call it baryonic matter), which is stuff made from protons, neutrons, and electrons. The problem astronomers have is that most of the matter in the universe is not ordinary matter – it’s a mysterious substance called dark matter.
What Is Dark Matter? An Introduction to One of Science’s …
2024年11月5日 · Dark matter is one of the universe’s most fascinating mysteries. Scientists believe it makes up about 27% of the universe, yet we can’t see or touch it. Unlike stars, planets, or any visible matter, dark matter doesn’t emit, absorb, …
DOE Explains...Dark Matter | Department of Energy
Scientific evidence points to dark matter being a new type of fundamental particle or particles that interact with ordinary matter through gravity. Scientists have several candidates for the types of particles that make up dark matter.