Saturday, March 25, 2017

Defining Planethood

Astronomers are making another effort to define the term "planet."  The last time they tried, in 2006, Pluto was demoted to dwarf planet status.

Under the proposed new definition,  Pluto would again be a full planet, but so would Europa and Titan.

Friday, March 24, 2017

Wheel Of Curiosity

The left middle wheel on the Curiosity rover is showing the first signs of breaking, according to NASA.

The space agency also said the damage does not threaten the mission.

Thursday, March 23, 2017

Mars' Dark Streaks

Dark streaks running down slopes on Mars during the warmest parts of the year have been seen as evidence of liquid flowing water.

A new study based on computer simulations, however, suggests they could be dry soil avalanches.

Wednesday, March 22, 2017

NASA Authorization

President Trump has signed a $19 billion authorization bill for NASA.

The new law tasks NASA with putting humans at Mars in the 2030s.

Tuesday, March 21, 2017

Arsis Mons

The huge Martian volcano Arsis Mons was last active about the time dinosaurs went extinct on Earth, according to a new study.

That seems a long time ago, but it's a short span in geologic terms.

Monday, March 20, 2017

North Korea Again

North Korea is supposedly working on a big new rocket engine.

The new engine would allow an ICBM to reach western North America.

Saturday, March 18, 2017

NASA Cuts

President Trump's proposed NASA budget, according to reports, cuts the Europa lander project and  the asteroid redirect mission, among other projects.

The proposal still has to get through Congress.