Gamma-ray astronomy is among the most exotic scientific pursuits.
Energy comes in a variety of flavors.
Most folks know that visible light is a form of energy, but light is really a mixture of different energy forms. When scientists first broke light into components, they discovered that it consists of a rainbow of colors - from blue through yellow and down to red. Each color represents a different kind of energy. Blue is more powerful than yellow, and both are more energetic than red. But those bands of energy are only the colors we can see.