What Costs A Half Billion And Orbits Mercury?

I just read an article about the NASA space probe, currently approaching Mercury.

Hey, I'm with you. Other than knowing it's a planet, I'm pretty stumped about Mercury.

From Wikipedia: Mercury (pronounced /ˈmɝkjʊəri/) is the innermost and smallest planet in the solar system, orbiting the Sun once every 88 days. It ranges in brightness from about −2.0 to 5.5 in apparent magnitude, but is not easily seen as its greatest angular separation from the Sun (greatest elongation) is only 28.3°. It can only be seen in morning or evening twilight. Comparatively little is known about the planet: the only spacecraft to approach Mercury was Mariner 10 from 1974 to 1975, which mapped only 40%–45% of the planet’s surface.

As the official geofffox.com meteorologist, I should add, temperatures on Mercury range from -292° F to 806° F!¹

Mercury is not a hospitable place. And, it's so close to the Sun, temperature would be the least of your problems. There's enough solar radiation to turn you into a Hot Pocket.

Back to the probe.

It's quite an ambitious undertaking, sending this 2,400 pound, car sized lab out into space. MESSENGER (that's it's name) was launched in 2004. It will map and otherwise probe Mercury.

This would be really cool, if it was free. Unfortunately, Reuters says MESSENGER will cost around a half billion dollars!

Oh sure, you think that's a lot of money. You're not NASA.

MESSENGER, short for MErcury Surface, Space ENvironment, Geochemistry, and Ranging, is the seventh mission in NASA's Discovery Program of lower cost, scientifically focused exploration projects.

I'm a science guy. I love discovery. This is ridiculous. The $446,000,000 could be better spent where the outcome might conceivably lead to a practical application.

NASA seems to do this all the time.

¹ - When temperatures are converted from one scale to another (Celsius to Fahrenheit), round numbers often become exact numbers. I believe the stated upper and lower limits of Mercurian temperature are estimates. Your mileage may vary.



2 Comments

Cousin Michael said:

I think you're a little off in attacking NASA for spending 0.5 billion to get to Mercury -- I mean, as a weatherman your number one job is to tell people the temperature, and how could you tell the temperature without the mercury that they need for thermometers?

Cousin Michael said:

Just kidding!

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This page contains a single entry by Geoff Fox published on 01/13/08 1:30 AM.

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