Melissa O'Neil
Two
Search results
Cast
Episode Guide
- 1. S1 E1 Jun 12, 2015
- The crew of a derelict spaceship awakens from stasis with no memories of who they are.
- 2. S1 E2 Jun 19, 2015
- While still struggling with revelations about their pasts, the crew are faced with a choice.
- 3. S1 E3 Jun 26, 2015
- When the ship mysteriously veers off course, the crew suspects sabotage.
In astronomy, dark matter is a hypothetical form of matter that appears not to interact with light or the electromagnetic field. Dark matter is implied by gravitational effects which cannot be explained by general relativity unless more matter is present than can be seen.
6 days ago · Dark matter is a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity. It makes up 30.1 percent of the matter-energy composition of the universe and has two varieties: baryonic and nonbaryonic.
- Adam Riess
- What is dark matter?Dark matter is a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity.
- What percentage of the matter-energy composition of the universe is made of dark matter?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 m...
- Who first inferred the existence of dark matter?Dark matter’s existence was first inferred by Swiss American astronomer Fritz Zwicky, who in 1933 discovered that the mass of all the stars in the...
- What are the types of dark matter?Two varieties of dark matter have been found to exist. The first variety is about 4.5 percent of the universe and made of the familiar baryons (i.e...
5 days ago · 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
Jan 28, 2022 · Dark matter makes up over 80% of all matter in the universe, but scientists have never seen it. We only assume it exists because, without it, the behavior of stars, planets and galaxies simply...
May 9, 2018 · Dark matter is a mysterious substance that permeates the universe and exerts gravitational influences, but has no electromagnetic charge. It is inferred from its gravitational effects, but not directly observed. Learn about its nature, origin, and detection from physicists and astronomers.
- Lisa Randall
- 2018
Dark matter is a mysterious substance that does not interact with the electromagnetic force and gives galaxies extra mass. Learn how researchers detect dark matter from its gravitational effects, what theories propose its existence, and how dark energy affects the universe.
Learn about the mysterious substances that affect and shape the cosmos, and how scientists are trying to figure them out. Explore stories, images, and topics related to dark matter and dark energy from NASA's website.
