Immediately on the heels of a successful orbital insertion two days ago, the European Space Agency today released the spacecraft’s first views of Venus. While I was eagerly anticipating the first Venus Express release from ESA, I was not expecting we’d receive imagery, data, and scientists’ first impressions so quickly (VE should begin its full science phase the first week of June). Right out of the gate there are some exciting developments — one heck of a start to the mission.

Composite, false-color view of Venus south pole captured by VIRTIS 12 April 2006 onboard Venus Express. Image credits: ESA / INAF-IASF, Rome, Italy, and Observatoire de Paris, France (More)

ESA’s Venus Express has returned the first-ever images of the hothouse planet’s south pole from a distance of 206,452 kilometers, showing surprisingly clear structures and unexpected detail. The images were taken 12 April during the spacecraft’s initial capture orbit after successful arrival on 11 April 2006.

Scientists are especially intrigued by the dark vortex shown almost directly over the south pole, a previously suspected but until now unconfirmed structure that corresponds to a similar cloud structure over the north pole. “Just one day after arrival, we are already experiencing the hot, dynamic environment of Venus,” said Dr Hakan Svedhem, Venus Express project scientist. “We will see much more detail at an unprecedented level as we get over 100 times better resolution as we get closer to Venus, and we expect to see these spiral structures evolve very quickly.”

The false-color VIRTIS composite image shows Venus’s day side at left and night side at right, and corresponds to a scale of 50 kms per pixel.

The day half is itself a composite of images taken via wavelength filters and chiefly shows sunlight reflected from the tops of clouds, down to a height of about 65 km above the planet’s surface.

The more spectacular night half, shown in reddish false color, was taken via an IR filter at a wavelength of 1.7 microns, and chiefly shows dynamic spiral cloud structures in the lower atmosphere, around 55 km altitude. The darker regions correspond to thicker cloud cover, while the brighter regions correspond to thinner cloud cover, allowing hot thermal radiation from lower down to be imaged.

See the full press release for more.

As is the case with the preliminary shots of Mars returned by MRO, these first glimpses of Venus are just a taste of what’s to come. As Venus Express settles into its operational science orbit, the imagery returned will yield significantly greater resolution. Note that the images used to construct the above composite were taken from over 200,000 kilometers (~125,000 miles) away from the Venusian south pole; in its science orbit, Venus Express will be beaming images back to Earth taken from a mere 300 kilometers (~186 miles) above the surface. I can’t wait to see more!