Our Blue Marble
It’s something you’ve probably seen a lot. It might even be the background on your smart phone. If you were born over a few decades ago, you would never have seen it: an image of Earth from space. This one is called Blue Marble 2012.
Why It Matters
- Beautiful photographs of Earth are compiled from tremendous amount of data. The data comes from a variety of instruments on various satellites.
- The Blue Marble, taken from Apollo 17 in 1972, helped people to look at Earth as one unit.
- Voyager 1 snapped Earth from about 3.7 billion miles (6 billion km) away in 1990. This image is called Pale Blue Dot, which is a perfect description.
With the link below, learn more about Earth images. Then answer the following questions.
- Science Friday, Creating Earth (video): http://www.sciencefriday.com/video/02/03/2012/creating-earth.html
- Why did the 1972 image called The Blue Marble have an effect on the environmental movement?
- Why is imaging Earth from space like “taking vital signs of the planet?”
- Why did Blue Marble 2012 need to be photoshopped?
- With all the computing ability NASA researchers have, why do they make visual images of Earth from space?