- What do we mean by dark matter and dark energy?
- What is the evidence for dark matter in galaxies?
- What is the evidence for dark matter in clusters of galaxies?
- Does dark matter really exist?
What might dark matter be made of?
ordinary of baryonic matter
- What is the role of dark matter in galaxy formation?
What are the largest structures in the universe?
Superclusters and voids
- Will the universe continue expanding forever?
Is the expansion of the universe accelerating?
Yes, we can tell by the brightness of a white dwarf supernova
- Who discovered this acceleration?