By Craig Covault

Some of the most influential leaders of the space community are quietly working to offer the next U.S. president an alternative to President Bush's "vision for space exploration"--one that would delete a lunar base and move instead toward manned missions to asteroids along with a renewed emphasis on Earth environmental spacecraft.

Top U.S. planetary scientists, several astronauts and former NASA division directors will meet privately at Stanford University on Feb. 12-13 to define these sweeping changes to the NASA/Bush administration Vision for Space Exploration (VSE).

Abandoning the Bush lunar base concept in favor of manned asteroid landings could also lead to much earlier manned flights to Mars orbit, where astronauts could land on the moons Phobos or Deimos.

Their goals for a new array of missions also include sending astronauts to Lagrangian points, 1 million mi. from Earth, where the Earth's and Sun's gravity cancel each other out and spacecraft such as replacements for the Hubble Space Telescope could be parked and serviced much like Hubble.

The "alternate vision" the group plans to offer would urge far greater private-sector incentives to make ambitious human spaceflight plans a reality.

There would also be some different "winners and losers" compared with the Bush vision. If the lunar base is deleted, the Kennedy Space Center could lose additional personnel because there would be fewer Ares V launches and no lunar base infrastructure work that had been assigned to KSC. On the other hand, the Goddard Space Flight Center and National Oceanic and Atmospheric Administration near Washington, along with the Jet Propulsion Laboratory (JPL) in California, would gain with the increased space environmental-monitoring goal.

Numerous planetary managers told Aviation Week & Space Technology they now fear a manned Moon base and even shorter sorties to the Moon will bog down the space program for decades and inhibit, rather than facilitate, manned Mars operations--the ultimate goal of both the Bush and alternative visions. The first lunar sortie would be flown by about 2020 under the Bush plan.

If alternative-vision planners have their way, the mission could instead be flown to an asteroid in about 2025.

Participants in the upcoming meeting contend there's little public enthusiasm for a return to the Moon, especially among youth, and that the Bush administration has laid out grandiose plans but has done little to provide the funding to realize them on a reasonable timescale.