From March 20-23, 2018, the Solar Dynamics Observatory captured a series of images of our Sun and then ran together three sequences in three different extreme ultraviolet wavelengths. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22360.jpg

Auroras are one of the many Earthly phenomena the crew of the International Space Station observe from their perch high above the planet. http://www.nasa.gov/sites/default/files/thumbnails/image/iss055e014528.jpg

The worlds orbiting other stars are called “exoplanets,” and they come in a wide variety of sizes, from gas giants larger than Jupiter to small, rocky planets about as big around as Earth or Mars. This rocky super-Earth is an illustration of the type of planets future telescopes, like NASA's TESS, hope to find outside our solar system. http://www.nasa.gov/sites/default/files/thumbnails/image/superearth20180412-16.jpg

Astronauts aboard the International Space Station captured this photo while flying over the western United States. The wide field of view stretches from the Sierra Nevada of California to the Columbia Plateau of Oregon and the Snake River Valley of Idaho. Lake Tahoe is nestled on the border of California and Nevada. http://www.nasa.gov/sites/default/files/thumbnails/image/iss055-e-1038_lrg.jpg

The Colorado High-resolution Echelle Stellar Spectrograph, or CHESS 4, was successfully launched on a NASA Black Brant IX sounding rocket at 12:47 p.m. EDT, April 16 (4:47 a.m. local, April 17) from the Kwajalein Atoll in The Republic of the Marshall Islands. http://www.nasa.gov/sites/default/files/thumbnails/image/chess_launch_wff-2018-015-384.jpg_.jpg

This colorful image, taken by NASA’s Hubble Space Telescope, celebrates the Earth-orbiting observatory’s 28th anniversary of viewing the heavens, giving us a window seat to the universe’s extraordinary stellar tapestry of birth and destruction. http://www.nasa.gov/sites/default/files/thumbnails/image/stsci-h-p1821a-m-1699x2000.png

Saturn’s rings display their subtle colors in this view captured on Aug. 22, 2009, by NASA’s Cassini spacecraft. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22418-1041.jpg

As our nearest star, the Sun bathes Earth in a steady stream of energetic particles, magnetic fields and radiation that can stimulate our atmosphere and light up the night sky, like the aurora borealis, or northern lights. http://www.nasa.gov/sites/default/files/thumbnails/image/northamerica_vir_2018111_lrg.jpg

NASA astronaut Ricky Arnold captured this clear view of Mount Rainier National Park as the International Space Station orbited above, sharing the image with his followers on April 25 to celebrate National Park Week. http://www.nasa.gov/sites/default/files/thumbnails/image/dbpbyitxcaa5ttg.jpg_orig.jpg

Greece and the Aegean and Ionian Seas http://www.nasa.gov/sites/default/files/thumbnails/image/iss055e008381.jpg

NASA's Operation IceBridge successfully collected data over several glaciers, research sites, and some parallel coastal grid lines on April 26, 2018, as part of its Spring 2018 campaign. http://www.nasa.gov/sites/default/files/thumbnails/image/valley.jpg

Far across the solar system, where Earth appears merely as a pale blue dot, NASA’s Galileo spacecraft spent eight years orbiting Jupiter. Newly resurrected data from Galileo's first flyby of Jupiter's moon Ganymede is yielding new insights. http://www.nasa.gov/sites/default/files/thumbnails/image/imgpsh_fullsize.jpeg

NASA's InSight Mars mission will help scientists understand the processes that shaped the rocky planets of the inner solar system (including Earth) more than four billion years ago. InSight, the first planetary mission to take off from the West Coast, is targeted to launch Saturday, May 5 from Vandenberg Air Force Base in California. http://www.nasa.gov/sites/default/files/thumbnails/image/insight_solar_array_panel_main-full.jpg

The lone active region visible on our Sun put on a fine display with its tangled magnetic field lines swaying and twisting above it (Apr. 24-26, 2018) when viewed in a wavelength of extreme ultraviolet light. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22449.jpg

NASA's InSight spacecraft rests aboard a ULA Atlas V rocket, awaiting launch scheduled on May 5, 2018. http://www.nasa.gov/sites/default/files/thumbnails/image/41876495681_24bd386693_k.jpg

Astronaut-educator Ricky Arnold conducts student-designed science on the Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/rickyarnold.jpg

Warm air and sunlight beget warmer ocean waters and provoke blooms of the “grass of the sea”—phytoplankton. http://www.nasa.gov/sites/default/files/thumbnails/image/northsea_oli_2018125_lrg.jpg

The crew of the International Space Station snapped this image of the full moon on April 30, 2018, as the station orbited off the coast of Newfoundland, Canada. http://www.nasa.gov/sites/default/files/thumbnails/image/iss055e043612.jpg

In the darkness of the distant universe, these galaxies resemble glowing fireflies, flickering candles, charred embers floating up from a bonfire, and light bulbs softly shining. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1819a.jpg

Galileo Galilei discovered Jupiter's moon Europa in 1610. More than four centuries later, astronomers are still making discoveries about its icy surface. http://www.nasa.gov/sites/default/files/thumbnails/image/europa_0.jpg