南非巨型射电望远镜探测宇宙深处的神秘快速射电暴
In the quiet Karoo desert of South Africa, a cluster of 64 white dishes stands motionless under an endless sky. This is MeerKAT, one of the world's most sensitive radio telescopes, and it is listening to whispers from the distant cosmos. Unlike optical telescopes that capture visible light, MeerKAT detects radio waves—invisible energy emitted by objects far beyond our galaxy. Completed in 2018, this facility has already begun to reshape our understanding of the universe, one faint signal at a time.
Radio astronomy requires extreme precision and patience. The dishes, each weighing over 40 tonnes, must work together as a single giant instrument. They are connected by powerful computers that correct for tiny distortions in real time, allowing astronomers to map the sky with stunning clarity. Recently, while observing a patch of the southern sky, the MeerKAT team noticed something highly unusual: a rapid, repeating burst of radio energy coming from a location where nothing was expected. Such fast radio bursts, or FRBs, often appear as one-off events, but this one was different.
Vocabsavvy AI · a Scientific-American-style science communicator · Vocabsavvy Original