Let’s Learn Something About Rocket Science

Sea Level Rise

For thousands of years, sea level has remained relatively stable. But now, Earth’s seas are rising. Since the beginning of the 20th century, they have risen about eight inches, and more than two inches in the last 20 years alone!

As water warms, it expands and takes up more space. That means that when oceans warm, the sea level rises. This summer, we’ve been researching exactly how global warming has impacted Greenland’s ice sheet. Our ICESat-2 mission will use a laser to measure the height of the planet’s surface. Over time, we will be able to provide a record of elevation change, and estimate how much water has melted into the ocean from land ice change.

So how much ice are we actually losing? Great question, but the answer might shock you. In Greenland alone, 303 gigatons of ice was lost in 2014!

Since we know that ice is melting, we’re working to gain a better understanding of how much and how fast. We’re using everything from planes, probes and boats, to satellites and lasers to determine the impact of global warming on the Earth’s ice.

Follow along for updates and information: http://climate.nasa.gov/

Image of the galaxy NGC 5866

Celestial Cypress by Paul Marcellini

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The Beauty of Earth

Albert Einstein in a vintage polo.

http://bit.ly/rawcuriosity

Take a look around Mars. Here’s where I’m working right now.

Click the link to see all my latest pictures from the surface of Mars.

M22 globular cluster

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In case you missed it earlier in July, here’s a look at how our view of Pluto has changed over the course of several decades. The first frame is a digital zoom-in on Pluto as it appeared upon its discovery by Clyde Tombaugh in 1930 (image courtesy Lowell Observatory Archives). The other images show various views of Pluto as seen by NASA’s Hubble Space Telescope beginning in the 1990s and NASA’s New Horizons spacecraft in 2015. The final sequence zooms in to a close-up frame of Pluto released on July 15, 2015.

This amazing view of details on Pluto came via New Horizons, which launched on Jan. 19, 2006. New Horizons swung past Jupiter for a gravity boost and scientific studies in February 2007, and conducted a reconnaissance flyby study of Pluto and its moons in summer 2015. Pluto closest approach occurred on July 14, 2015. As part of an extended mission, the spacecraft is expected to head farther into the Kuiper Belt to examine one or two of the ancient, icy mini-worlds in that vast region, at least a billion miles beyond Neptune’s orbit.

Image credits available here.