Peering over ALMA’s shoulder : 無料・フリー素材/写真
Peering over ALMA’s shoulder / European Southern Observatory
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Two large, pale discs can be seen in today's Picture of the Week: one of them in the Atacama Desert, the other orbiting the Earth 384 000 km away.The latter is our ever-present Moon, faintly hanging in the clear blue sky. Next to it is the real star of the image: one of the antennas of the Atacama Large Millimeter/submillimeter Array (ALMA).ALMA, which ESO operates together with international partners, is made up of 66 such antennas, spread out atop the 5000-m high Chajnantor Plateau in Chile. Unlike optical telescopes, which gather light in wavelengths that we can see, these dishes observe the cool corners of the Universe using longer, invisible wavelengths — somewhere between infrared radiation and radio waves.These antennas work together, creating a huge virtual telescope with a complex technique called interferometry. By adjusting the separation between the antennas, which can go up to 16 km, astronomers can study cosmic objects in different levels of detail. With all of its individual dishes working together in perfect harmony, ALMA truly becomes more than the sum of its parts.Credit: Y. Villalon/ESO |
| 撮影日 | 2025-06-02 06:00:00 |
| 撮影者 | European Southern Observatory |
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