- Who
- Unknown
- What
- 3 percentage
- Where
- Unzutreffend ()
- When
The least reflective body yet discovered in the Solar System is Comet Borrelly. This 8 km-long (5 miles) comet nucleus was imaged by the Deep Space 1 unmanned spacecraft on 22 September 2001. The surface of Borrelly is so dark that it reflects less than 3% of the sunlight it receives. As a comparison, Earth reflects around 30% of the sunlight it receives. Borrelly's low albedo is due to dark dust coating the surface.
Borrelly has about half the albedo of the Moon, which is as dark as an asphalt car park surface. Albedo means the fraction of light reflected. An albedo of 1 would correspond to a perfect mirror which reflected 100% of the light it received.
Borrelly has about half the albedo of the Moon, which is as dark as an asphalt car park surface. Albedo means the fraction of light reflected. An albedo of 1 would correspond to a perfect mirror which reflected 100% of the light it received.
