Pale Green Dot

Proxima Centauri b could look green if there's oxygen in its atmosphere, researchers say.

The green would come from auroras, not vegetation.

The Next Giant Leap

Vice President Mike Pence has announced the U. S. Trump administration will return astronauts to the Moon as a stepping stone towards sending humans to Mars.

He also said America will work with international partners and commercial interests to build a space economy.

Perspective

Costco is reporting revenues of over $42 billion dollars in its latest quarter.

That's more than twice NASA's projected annual budget.

No Alien Megastructure

Astronomers have concluded there is no megastructure around Tabby's Star.

They say dust causes the odd dimming.

Sputnik

Today is the 60th anniversary of the launch of Sputnik.

Few events really change the world, but Sputnik did.

Mars Methane

New research suggests intermittent warm periods on Mars can be explained by explosions of methane into the atmosphere.

During such warm periods, lakes of water could exist on the surface.

Mars Water

Researchers going back over old data have found evidence suggesting there may be water near the equator of Mars.

That would be a boon to future manned Mars exploration.