HAMPTON, Va. (AP) — A NASA symposium in Virginia is examining ideas that may lead to advanced and innovative space technologies.

The federal space agency is holding its Innovative Advanced Concepts program's fall symposium in Hampton. The two-day event began Wednesday.

NASA says the issues discussed are critical to enable the agency's missions in the next 10 to 100 years.

Panel topics include propulsion and power, space debris removal, near-Earth object mitigation, humans in space and on the surface of planets, robotics and space probes, and imaging and communications. Experts in aerospace and advanced technologies also are giving keynote presentations and discussing the latest news about program's progress and plans.