International experts converged on Mexico City this month to discuss the best way to establish a global detection and warning network to monitor potential asteroid threats to all life on Earth.

A new report from the National Research Council lays out options NASA could follow to detect more near-Earth objects (NEOs) – asteroids and comets that could pose a hazard if they cross Earth’s orbit. The report says the $4 million the U.S. spends annually to search for NEOs is insufficient to meet a congressionally mandated requirement to detect NEOs that could threaten Earth.

Russia is considering a plan to launch a spacecraft capable of moving a huge asteroid in a bid to protect Earth from an impact, but the target space rock poses virtually no threat to our planet and moving it could actually make matters worse, experts say.

Momentum is building towards an official U.S. policy to defend Earth against asteroids with a US National Research Council panel that by year's end will recommend a strategy to better address the threat from near-Earth objects. That study, along with the air force's report on its asteroid impact exercise, is intended to help the White House develop an official policy on the near-Earth object hazard by October 2010, which Congress has requested.

NASA needs more cash in order to meet its goal of finding nearby space rocks that could hit Earth in a devastating impact, a new report says.

Congress ordered NASA in 2005 to find and track 90 percent of the large asteroids near Earth by 2020, but did not set aside the necessary funds required to do the job, according to a report released Wednesday by the National Academy of Sciences.

New computer simulations reveal a slight chance that a disruption of planetary orbits could lead to a collision of Earth with Mercury, Mars or Venus in the next few billion years.

Existing sky surveys miss many asteroids smaller than 1 kilometre across, leaving the door open to damaging impacts on Earth with little or no warning, a panel of scientists reports. Doing better will require devoting more powerful telescopes to asteroid hunting, but no one has committed the funds needed to do so, it says.

Without more funding, NASA will not meet its goal of tracking 90 percent of all deadly asteroids by 2020, according to a report released today by the National Academy of Sciences.

The US military has abruptly ended an informal arrangement that allowed scientists access to data on incoming meteors from classified surveillance satellites. The change is a blow to the astronomers and planetary scientists who used the information to track space rocks, especially those that burn up over the oceans or in other remote locations.

For 15 years, scientists have benefited from data gleaned by U.S. classified satellites of natural fireball events in Earth's atmosphere but a recent U.S. military policy decision now explicitly states that these observations are classified.