Dark Matter and Dark Energy are terms which are increasingly becoming mainstream due to their portrayal in TV and movies. Watch this amazing Video explaining what is Dark matter and energy and the difference between them.
Minute Physics: What is Dark Matter? In this episode, we discuss Dark Matter, an exotic type of matter we know very little about, despite the fact that it makes up around 80% of all matter in the universe!
Both dark matter and dark energy have yet to be directly observed, and scientists know very little about them. However, research definitely points to their existence. Without dark energy, the expansion of the universe would be slowing due to gravity (and in fact, this is what people believed up until the end of the 1990s). But the universe’s expansion is speeding up—and scientists think that the unknown properties of dark energy are the key to explaining this process.