Custom Search
Home | Site Map | What's New | Image Index | Copyright | Puzzles | Posters | ScienceViews | Science Fiction & Fantasy |

PHOTO INDEX OF
PRIMARY TARGETS
ASTEROIDS
COMETS
EARTH
JUPITER
KUIPER BELT
MARS
MERCURY
METEORITES
NEPTUNE
OORT CLOUD
PLUTO
SATURN
SOLAR SYSTEM
SPACE
SUN
URANUS
VENUS
ORDER PRINTS

OTHER PHOTO INDEXES
ALL TARGETS
PHOTO CATEGORIES

SCIENCEVIEWS
AMERICAN INDIAN
AMPHIBIANS
BIRDS
BUGS
FINE ART
FOSSILS
THE ISLANDS
HISTORICAL PHOTOS
MAMMALS
OTHER
PARKS
PLANTS
RELIGIOUS
REPTILES
SCIENCEVIEWS PRINTS

Hellas Impact Basin

Target Name:  Mars
Spacecraft:  Mars Global Surveyor
Produced by:  GSFC/NASA
Copyright: Public Domain
Date Released: 27 May 1999

Related Document
Download Options

NameTypeWidth x HeightSize
mgstopo5.jpgJPEG640 x 48097K
mgstopo5.jpgJPEG2560 x 1920598K

The massive Hellas impact basin in the Southern Hemisphere is another striking feature on Mars. Nearly six miles (nine kilometers) deep and 1,300 miles (2,100 kilometers) across, the basin is surrounded by a ring of material that rises 1.25 miles (about two kilometers) above the surroundings and stretches out to 2,500 miles (4,000 kilometers) from the basin center.

This ring of material, likely thrown out of the basin during the impact of an asteroid, has a volume equivalent to a two-mile (3.5-kilometer) thick layer spread over the continental United States, and it contributes significantly to the high topography in the Southern Hemisphere.

Copyright © 1995-2013 by Calvin J. Hamilton. All rights reserved.