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News Release Archive:

News Release 631 of 949

May 19, 1999 12:00 AM (EDT)

News Release Number: STScI-1999-22

Colossal Cyclone Swirls near Martian North Pole

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Image: Mars

MarsSTScI-PRC1999-22a

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ABOUT THIS IMAGE:

Here is the discovery image of the Martian polar storm as seen in blue light (410 nm). The storm is located near 65 deg. N latitude and 85 deg. W longitude, and is more than 1000 miles (1600 km) across. The residual north polar water ice cap is at the top of the image. A belt of clouds like that seen in previous telescopic observations during this Martian season can also be seen in the planet's equatorial regions and northern mid-latitudes, as well as in the southern polar regions. The volcano Ascraeus Mons can be seen as a dark spot poking above the cloud deck near the western (morning) limb. This extinct volcano towers nearly 16 miles (25 km) above the surrounding plains and is about 250 miles (400 km) across.

Object Name: Mars

Image Type: Astronomical

NEWS RELEASE IMAGES

The above image is part of a montage:

Montage Image: Colossal Polar Cyclone on Mars Image Type: Astronomical Colossal Polar Cyclone on MarsPRC1999-22 Martian Cyclone, Seen From the North Polar Region Image Type: Astronomical Martian Cyclone, Seen From the North Polar RegionPRC1999-22b Mars Image Type: Astronomical MarsPRC1999-22c

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