佐久間 康平

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An active region on the sun emitted a mid-level solar flare, peaking at 4:47 a.m. EST on Nov. 5, 2014. This is the second mid-level flare from the same active region, labeled AR 12205, which rotated over the left limb of the sun on Nov. 3. The image was captured by NASA's Solar Dynamics Observatory (SDO) in extreme ultraviolet light that was colorized in red and gold. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel. This flare is classified as an M7.9-class flare. M-class flares are a tenth the size of the most intense flares, the X-class flares. The number provides more information about its strength. An M2 is twice as intense as an M1, an M3 is three times as intense, etc. Image Credit: NASA/SDO #SDO #SolarFlare #Sun #Solar #nasa #space

Before drifting off to tonight, astronaut Scott Kelly (@stationcdrkelly) aboard the International Space Station posted this image and wrote, "Day 179. The #Nile at night is a beautiful sight for these sore eyes. Good night from @ISS! #YearInSpace." Kelly is living and working off the Earth, for the Earth aboard the station for a yearlong mission. Traveling the world about 250 miles above the Earth, and at 17,500 mph, he circumnavigates the globe more than a dozen times a day. Image Credit

NASA scientists propose to make Pluto a planet again

Alan Stern has never been happy with Pluto’s demotion to dwarf planet. Principal investigator of NASA’s New Horizons mission, he told Gizmodo the …

2016 August 7 - Io: Moon over Jupiter

<b>Io: Moon over Jupiter</b> <b><br>Image Credit:</b> Cassini Imaging Team, SSI, JPL, ESA, NASA<p><b>Explanation:</b> How big is Jupiter's moon Io? The most volcanic body in the …

Parallel

Event Horizon

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Pluto's Wonders Come into Focus

Last July, NASA’s New Horizons spacecraft flew by Pluto, the last unvisited world of the classical solar system. As the largest known member of the …

Solar System

NASA's Kepler Mission Could Detect Exomoons Formed by Giant Impacts

The hunt is on for moons orbiting distant exoplanets — but only the most massive "exomoons" may be detectable.<p>In 2012, a team of scientists from the …

Universe

Scientists can directly observe alien planets with a new tool

Astronomers usually have to study exoplanets through roundabout ways, such as watching for the decrease in light when a planet crosses in front of a star. However, they'll soon have a reliable way to observe those alien worlds directly. A Princeton-led research team has successfully tested CHARIS, …

NASA discovers 7 Earth-sized planets outside our solar system

In a press conference today, NASA scientists revealed an extraordinary new discovery – the first known system of seven rocky, Earth-sized planets …

Sun shining down on our planet: This image was taken by astronaut Terry Virts from the International Space Station (@ISS). He posted the photo and wrote, "I wish I could bring all of you up to see this!" Image Credit

Hubble Peers into the Heart of a Galactic Maelstrom

Our Hubble Space telescope found what looks like a cosmic, double-bladed lightsaber just in time for the release of #StarWars. This celestial lightsaber does not lie in a galaxy far, far away, but rather inside our home galaxy, the Milky Way. In the center of the image, partially obscured by a dark, Jedi-like cloak of dust, a newborn star shoots twin jets out into space as a sort of birth announcement to the universe. This is inside a turbulent birthing ground for new stars known as the Orion B molecular cloud complex, located 1,350 light-years away. Credit: NASA/ESA #nasa #space #hubble #science #astronomy #telescope