What characteristic differentiates a High-Velocity Cloud (HVC) from other interstellar clouds?
Answer
It moves significantly faster than the regular rotation of the Milky Way
High-Velocity Clouds are distinguished by possessing a radial velocity greater than 90 kilometers per second relative to the local standard of rest, meaning they move much faster than expected.
Related Questions
What is the formal astronomical term for the colossal, diffuse structures of gas and dust between the stars?What are the two primary components that make up an interstellar cloud's makeup?What defines an interstellar region as an H I region?What stellar event is often suggested as the origin for the tiny particles of cosmic dust found in interstellar clouds?What specific physical condition allows gas atoms to bond into molecules, forming molecular clouds?When a star much more massive than the Sun exhausts its fuel, what results from its catastrophic explosion?How does an Emission Nebula generate its characteristic bright, glowing appearance?What mechanism causes Reflection Nebulae to typically display a shimmering blue appearance?How does a nebula typically appear when viewed by the naked eye or through basic binoculars?What characteristic differentiates a High-Velocity Cloud (HVC) from other interstellar clouds?