nasa

アメリカ合衆国の宇宙開発機関、それがNASA(ナサ)である。そのNASAの公式アカウントがSNSの「インスタグラム」にあることはご存じだろうか? 

インスタグラムにアップされているNASAの写真は神秘的なものばかり。そこで今回は、神秘的すぎる宇宙の姿が詰め込まれたNASAのインスタグラムについてご紹介したい。

・2013年10月に開設

ご存じの方も多いと思うが、ざっくりと「インスタグラム」の説明をしよう。インスタグラムとは、全世界で2億人以上のユーザが利用している写真共有サービスの最大手である。著名人や芸能人の公式アカウントも多いが、2013年10月に公式アカウントを開設したのがNASAだ。

2014年11月現在、約190万人のフォロワーを持つNASAの公式アカウントだが、その目玉は何といっても宇宙の写真の数々。普段はなかなか見かけることが出来ない、「様々な角度からの宇宙」が惜しげもなくアップされている。

・力強く美しい画像の数々

思いもしない色の惑星の姿、恐ろしさすら感じさせる太陽の表情、絵の具で塗ったかのような星など、自力では絶対に撮影できない画像ばかりだ。そのどれもが力強く、その全てが美しい……「これぞ神秘!」と時間が経つのも忘れて魅入ってしまうこと間違いなしだ。

ちなみにインスタグラムにアカウント登録していなくても画像は確認できる。宇宙の片鱗(へんりん)に触れられるNASAの公式インスタグラム。興味がある人はチェックしてみてほしい。

参照元:Instagram @nasa
執筆:P.K.サンジュン

▼龍が泳いでいるかのよう。

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Our Fermi Gamma-ray Space Telescope detected a rapid-fire "storm" of high-energy blasts from a highly magnetized neutron star, also called a magnetar, on Jan. 22, 2009. Now astronomers analyzing this data have discovered underlying signals related to seismic waves rippling throughout the magnetar. Such signals were first identified during the fadeout of rare giant flares produced by magnetars. Over the past 40 years, giant flares have been observed just three times — in 1979, 1998 and 2004 — and signals related to starquakes, which set the neutron stars ringing like a bell, were identified only in the two most recent events. Neutron stars are the densest, most magnetic and fastest-spinning objects in the universe that scientists can observe directly. Each one is the crushed core of a massive star that ran out of fuel, collapsed under its own weight, and exploded as a supernova. A neutron star packs the equivalent mass of half-a-million Earths into a sphere about 12 miles across, roughly the length of Manhattan Island in New York City. While typical neutron stars possess magnetic fields trillions of times stronger than Earth's, the eruptive activity observed from magnetars requires fields 1,000 times stronger still. To date, astronomers have confirmed only 23 magnetars. Seen here is a rupture in the crust of a highly magnetized neutron star in an artist's rendering. It can trigger high-energy eruptions. Fermi observations of these blasts include information on how the star's surface twists and vibrates, providing new insights into what lies beneath. Image Credit: NASA's Goddard Space Flight Center/S. Wiessinger

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▼こちらも龍が飛び出してきたようだ。

▼地球に住んでいると想像もつかない色。

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Study Finds Earth’s Ocean Abyss Has Not Warmed: The cold waters of Earth’s deep ocean have not warmed measurably since 2005, according to a new NASA study, leaving unsolved the mystery of why global warming appears to have slowed in recent years. Scientists at our Jet Propulsion Laboratory (JPL) analyzed satellite and direct ocean temperature data from 2005 to 2013 and found the ocean abyss below 1.24 miles (1,995 meters) has not warmed measurably. Study coauthor Josh Willis of JPL said these findings do not throw suspicion on climate change itself. This image shows heat radiating from the Pacific Ocean as imaged by our Clouds and the Earth's Radiant Energy System instrument on the Terra satellite. (Blue regions indicate thick cloud cover.) Image Credit: NASA #nasa #earth #earthrightnow #climate #satellites #terra #oceans #science

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▼陶器で作られたようななめらかさだ。

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Saturn's many cloud patterns, swept along by high-speed winds, look as if they were painted on by some eager alien artist. With no real surface features to slow them down, wind speeds on Saturn can top 1,100 mph (1,800 kph), more than four times the top speeds on Earth. This view looks toward the sunlit side of the rings from about 29 degrees above the ringplane. The image was taken with the Cassini spacecraft wide-angle camera on April 4, 2014 using a spectral filter which preferentially admits wavelengths of near-infrared light centered at 752 nanometers. The view was obtained at a distance of approximately 1.1 million miles (1.8 million kilometers) from Saturn. Image scale is 68 miles (109 kilometers) per pixel. Credit: NASA/JPL-Caltech/Space Science Institute #cassini #saturn #solarsystem #planets #nasa #space #cassinisaturn

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▼宇宙からみたオーロラ。

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Flying Through an Aurora: European Space Agency astronaut Alexander Gerst posted this photograph taken from the International Space Station to social media on Aug. 29, writing, "words can't describe how it feels flying through an #aurora. I wouldn't even know where to begin…." Crew members on the space station photograph the Earth from their unique point of view located 200 miles above the surface. Photographs record how the planet is changing over time, from human-caused changes like urban growth and reservoir construction, to natural dynamic events such as hurricanes, floods and volcanic eruptions. Crew members have been photographing Earth from space since the early Mercury missions beginning in 1961. The continuous images taken from the space station ensure this record remains unbroken. Image Credit: NASA/ESA/Alexander Gerst #nasa #iss #spacestation #space #exp40 #science

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▼まさに宇宙の神秘である。