JAXA: Mysteries of Venus Targeted by New Japanese Probe

SPACE.com -- Mysteries of Venus Targeted by New Japanese Probe

A new Japanese space probe is poised to launch toward Venus today to help solve the enduring mysteries of the hellish, cloud-covered world, which has been often described as Earth's twin.

The Venus Climate Orbiter Akatsuki, which means "Dawn" in Japanese, is set to launch from Tanegashima Space Center in Japan today on a 2-year mission to study the weather and surface of Venus in unprecedented detail. Liftoff is set for 5:44 p.m. EDT today, though it will be early Tuesday morning local time at the launch site.

"Once we can explain the structure of Venus, we will be able to better understand Earth," said Akatsuki project scientist Takeshi Imamura in a statement released by the Japan Aerospace Exploration Agency (JAXA). "For example, we may discover the reasons that only Earth has been able to sustain oceans, and why only Earth is abundant in life."

Imamura has called Akatsuki "the world's first interplanetary probe that deserves to be called a meteorological satellite."

The probe carries five different cameras to study Venus' clouds as well as map the planet's weather and peer through its thick atmosphere to view the surface. It will join Europe's Venus Express already in orbit around the planet, and has scientists on that mission eager as well.

"Venus somehow transformed from a more Earth-like place to the alien place it is today, and what's fascinating about the world is figuring out how it diverges from the Earth and the history behind why that happened," said David Grinspoon, curator of astrobiology at the Denver Museum of Nature and Science and an interdisciplinary scientist on the Venus Express mission. "It could help us understand how things here might change."

Akatsuki will launch atop a Japanese H-2A rocket and won't be alone during blastoff. JAXA is launching several smaller satellite experiments with the mission, including an ambitious solar sail designed to tag along on the trip to Venus. [More on Japan's solar sail mission.]