The Hubble Space Telescope is well known for its picturesque views of nebulae and galaxies, but it’s also useful for studying our own planets, including Mars. Hubble snapped a close-up of the Red Planet ahead of its opposition on May 22. That means that the sun and mars will be on exact opposite sides of the Earth. Hubble’s view reveals Mars as a dynamic seasonal planet with bright, frosty polar caps and clouds above a vivid, rust-colored landscape. Details: http://go.nasa.gov/1TjWUVV | NASA - N

1.7K views · 124 reactions | Nuclear thermal propulsion rockets are more energy dense than chemical rockets and twice as efficient. Here's how they work. Learn more: https://bit.ly/38sotWg | U.S. Department of Energy Office of Nuclear Energy | Facebook