Category: Mars Express

Video of Mars Express orbiting the Red Planet

This movie shows views of Mars as Mars Express loops between apoapsis (maximum height above the surface), at 10,527 km, to periapsis (lowest height), at just 358 km, and back again.
The giant volcanoes of Mars can be clearly seen at the start of the video, visible as a constellation of dark spots on the desert surface. They are followed by a glimpse of the icy South Pole before plunging into the darkness of the planet’s night side. Daylight returns with a soaring ride over the spiral ices of the Martian North Pole. At the very end, Phobos passes far beneath Mars Express, and the tiny moon’s disk can be seen as a dark circle moving from top to bottom.
The images used to generate this video, 600 in total, were acquired by the Visual Monitoring Camera (VMC) during the 8194th orbit on May 27, 2010, between 02:00 and 09:00 UTC. This is the first such video ever generated from a spacecraft orbiting Mars.
The VMC is a low-resolution, non-scientific digital camera originally used only to confirm the separation of the (later lost) Beagle 2 lander from Mars Express in 2003.

See also:
Astronaut’s eye view: Mars Express orbiting the Red Planet

Ascraeus Mons caldera

Ascraeus Mons is the northernmost of three shield volcanoes (known as the Tharsis Montes) near the equator of Mars. Its complex caldera (volcanic crater) is composed of several discrete centers of collapse, where the older collapse features are cross-cut by more recent collapse events. The lowermost circular floor preserves the last lava flooding event that followed the last major collapse approximately 100 million years ago. The southern wall of the caldera has at least 3 km of vertical relief with an average slope of at least 26 degrees (from horizontal). The caldera complex truncates several lava flows, indicating that the flows predate the collapse event and that their source areas have been destroyed by the caldera formation.

References:
G. Neukum et al.: Recent and episodic volcanic and glacial activity on Mars revealed by the HRSC (853 KB)

The image was taken on January 31, 2004, by the High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express spacecraft.
Color composite of the infrared, green and blue channels of the HRSC, adapted to a Mars-like appearance.
The image resolution is 15 m per pixel. North is up.

(Image Credit: ESA/DLR/FU Berlin/astroarts.org)

High-resolution JPEG (4130×3880 pixels; 2.12 MB)