It is a bit bigger and somewhat colder, but a planet circling a star 500 light-years away is otherwise the closest match of our home world discovered so far, astronomers announced on Thursday.

This comes from Scientists Find an ‘Earth Twin,’ or Perhaps a Cousin in the New York Times.

Here is something that bothers me in this story, and in some of the pronouncements of astronomer’s in general. The way this is reported, it sounds like they know for sure that what they saw is 1) a planet; 2) of a certain size; 3) orbiting a Sol-like star; 4) orbiting in the ‘habitable zone’ of that star. All of these pronouncements are stated matter-of-fact-like.

Yet what do they really know?

[Read more…]

In my life time, that’s how much the radius of the earth has changed, according to NASA.

The scientists estimated the average change in Earth’s radius to be 0.004 inches (0.1 millimeters) per year, or about the thickness of a human hair, a rate considered statistically insignificant.

I am sure you were waiting with bated breath for that bit of news!

I’m just wondering if that means 108 hair-widths for the diameter??

I remember the exciting days of the Apollo program very well. I remember the breathless excitement of hearing Neil Armstrong’s famous words come crackling over a transistor radio as we boys listened in our bunks the first night of our week at camp.

Do you know how powerful the technology was that controlled that mission?

The flight computer onboard the Lunar Excursion Module, which landed on the Moon during the Apollo program, had a whopping 4 kilobytes of RAM and a 74 KB "hard drive." In places, the craft’s outer skin was as thin as two sheets of aluminum foil.

That was then.

This is now. NASA’s plans for the coming longer moon missions are much more elaborate with much more sophisticated equipment. You can read about some of it at the link above.

The many extremes faced by astronauts heading for the moon, and later, they hope, to Mars, seem to reinforce the notion that the earth is truly the only home of life in the universe. (Can’t prove it, but it is a notion I hold nonetheless.)

How inhospitable the rest of creation seems to be!

And how fascinating!

Star Trek’s Dr. McCoy had a Tricorder device that was able to diagnose almost any physical condition. It may not yet appear in your doctor’s office, but NASA is working on a device that may be able to discern what’s bugging you:

“Ultimately we want to provide cartridges for all kinds of micro-organisms and chemical compounds,” says Morris. “We’d even like to be able to use our system to figure out what ‘bug’ an astronaut has if he or she becomes ill.”

Lisa Monaco, LOCAD project scientist, adds her vision of the future: “What we are developing at MSFC has use not only on the ISS, but also on lunar missions, long duration stays on other planets, and most certainly here on Earth.”

In the years ahead, as space voyages become longer and longer, it will be even more imperative to have ways of checking astronauts’ health and monitoring electronics. For the record, no astronaut has ever become seriously ill on any space mission. However, the scientists point out that if an astronaut did ever get sick, it would take too much time to send a sample back to Earth, have it tested, and receive a long-distance answer. With next-generation LOCAD technologies, detection and diagnosis would be quick, easy, and on the spot.

Dr. McCoy, here we come.

Emphasis mine.

Just one of those cool things going on at NASA.

Read the whole article for the current state of the project.