(12 Nov. 1966) — Astronaut James A. Lovell Is Photographed Inside His Gemini Spacecraft During The

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/

Ever wonder about what lies between the stars? Learn all about the interstellar medium in this short video! Follow Evant Horizon for more astronomy posts!

The interstellar medium is the gas and dust between stars. Of its mass, this gas is composed of mainly hydrogen and helium with a touch of heavier elements. Highly dense regions of the ISM known as molecular clouds are directly responsible for the formation of stars.

A photo of Saturn. Took by Cassini with COISS on January 07, 2012 at 23:20:38. Detail page on OPUS database.

This is the most detailed map yet of our place in the universe

Say hello to Laniakea, our local galaxy supercluster.

The Laniakea Supercluster (Laniakea; also called Local Supercluster or Local SCl) is the galaxy supercluster that is home to the Milky Way, our galaxy, and therefore to the Solar System and the Earth.

Comet PanSTARRS and a Crescent Moon

The beautiful surface of Europa

Dust Band Around the Nucleus of “Black Eye Galaxy” M64

New video! Dark nebulae in a nutshell!

Follow Evanthorizon for more astronomy posts!