STS056-21-1
| NASA Photo ID | STS056-21-1 |
| Focal Length | mm |
| Date taken | 1993.04.__ |
| Time taken | GMT |
Resolutions offered for this image:
640 x 480 pixels
640 x 480 pixels
Cloud masks available for this image:
Spacecraft nadir point:
Photo center point:
Photo center point by machine learning:
Photo center point:
Photo center point by machine learning:
Nadir to Photo Center:
Spacecraft Altitude: nautical miles (0km)
Country or Geographic Name: | ATMOSPHERIC LIMB |
Features: | OVER INDIAN OCEAN |
| Features Found Using Machine Learning: | |
Cloud Cover Percentage: | |
Sun Elevation Angle: | ° |
Sun Azimuth: | ° |
Camera: | Nikon 35mm film camera |
Focal Length: | mm |
Camera Tilt: | High Oblique |
Format: | 5028: Kodak, color positive,Vericolor 400 Proof (VPH),ASA 400, standard base |
Film Exposure: | Normal |
| Additional Information | |
| Width | Height | Annotated | Cropped | Purpose | Links |
|---|---|---|---|---|---|
| 640 pixels | 480 pixels | No | No | ISD 1 | Download Image |
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Image Caption: STS-56 Earth observation shows a sunset in the southern hemisphere, as seen from east to west by the astronaut crewmembers aboard the Earth-orbiting Discovery, Orbiter Vehicle (OV) 103. Classic color changes from reds to blues are caused by white (composite) light passing through density and atmospheric particulate boundaries. Colors are refracted preferentially according to the diameter of the particles in the visible spectrum with longer wavelengths (reds) refracted the most. The phenomena can be seen here as the reds (0.7 micron) are bent the most while blues (0.4 micron) are bent the least. The dark substance suspended in the upper stratosphere in the left portion of this scene is of unknown origin. NASA scientists studying the STS-56 photography feel that the most likely sources for these substances are volcanic ash or sulfur dioxide (SO2) ejected into the stratosphere by volcanoes, such as the recent eruptions of Mt. Pinatubo (Philippines), Mt Spurr (Alaska), and Mt. Hudson (Chil
