
We have found an interesting rock.
But now, after 33 years, that has changed: at 17 billion kilometers (10.6 billion miles) from the Sun, the spacecraft has reached the point where the solar wind has slowed to a stop. Literally, the wind is no longer at Voyager’s back.
There is gas between the stars, which astronomers call the interstellar medium. The solar wind blows out into it, slowing. There is a region, over a billion kilometers thick, where the solar wind plows to a halt, creating a roughly spherical shell around the solar system. That’s called the heliosheath, and it looks like Voyager 1 is now solidly inside it. In fact, it’s been there for four months or so; the scientists measuring the solar wind speed noticed it dropped to 0 back in June, but it took a while to make sure this wasn’t just some local eddy in the flow. It’s not. Voyager 1 now has calm seas ahead.
But the probe is still moving outward at 60,000 kph (38,000 mph). In a few more years it’ll leave the heliosheath behind, and when that happens it will truly be in interstellar space, the vast and nearly empty region between the stars. At that moment it will be the first human device ever to truly leave the solar system and enter the great stretches of the galaxy beyond.To infinity and beyond!
This is easy! I can do this too!WASHINGTON (AP) -- The Bush administration is drastically scaling back efforts to measure global warming from space, just as the president tries to convince the world the U.S. is ready to take the lead in reducing greenhouse gases.
A confidential report to the White House, obtained by The Associated Press, warns that U.S. scientists will soon lose much of their ability to monitor warming from space using a costly and problem-plagued satellite initiative begun more than a decade ago.
Last week, NPR asked NASA administrator Michael Griffin said that while he was “aware that global warming exists,” he wasn’t sure whether it “is a longterm concern or not.” Griffin said he is “not sure that it is fair to say that it is a problem we must wrestle with.”What does it feel like, Mr. Griffin, to gain a pal in the White House but help lose a planet?Griffin subsequently clarified his remarks, stating that protecting the earth against global warming is not in the agency’s mission statement:
The agency is responsible for collecting data that is used by the science community and policy makers as part of an ongoing discussion regarding our planet’s evolving systems. It is NASA’s responsibility to collect, analyze and release information. It is not NASA’s mission to make policy regarding possible climate change mitigation strategies.”
But from 2002-2006, it was. Part of NASA’s mission was to “protect our home planet“:
In Feb. 2006, the mission statement was “quietly altered” to remove the phrase “to understand and protect our home planet.”To understand and protect our home planet; to explore the universe and search for life; to inspire the next generation of explorers … as only NASA can.