Intan Rakhmayanti Dewi, CNBC Indonesia
Tech
Friday, 07/07/2023 13:40 WIB
Photo: Gemini 9 Capsule Spacecraft (AP Photo)
Jakarta, CNBC Indonesia – Earth receives a signal from the far end of space which is obtained from a radio telescope. The signal contains an image of an early moment in the universe that is 13.8 billion years old.
Collect Science Alertthe signal from that end of space comes from light, hydrogen atoms, a long distance and was captured by the Giant Metrewave Radio Telescope (GMRT) in India.
The telescope picked up signals from the past, namely the distance between when light was emitted and detected on Earth, reaching 8.8 billion years.
This distance exceeds the previous record which ‘only’ reached 4.4 billion years. Meanwhile, Science Alert writes that the wavelength of light from the recently discovered hydrogen atom is 21 centimeters.
“A galaxy emits a number of different types of radio signals,” said cosmologist Arnab Chakraborty of Canada’s McGill University, quoted Friday (7/7/2023).
“Until now it could only pick up specific signals from nearby galaxies, which limited knowledge of galaxies closest to Earth.”
The research team used a gravitational lens to detect the signal. It turns out that it comes from a star-forming galaxy named SDSSJ0826+5630.
For information, gravitational lensing or gravitational lensing is where light is magnified when it follows a curved space. The space surrounding the large object is between the telescope and the original source.
Astrophysicist Nirupam Roy explains that in some cases, the signal can be deflected due to an even bigger object. One example is another galaxy.
“In this particular case, the signal was deflected by the presence of another massive object, another galaxy, between the target and the observer,” he explained.
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2023-07-07 06:40:00
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