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| Image from the original article |
The BICEP telescope at the South Pole. Image credit: Harvard-Smithsonian Center for Astrophysics. [source]
A major story had just appeared across international news outlets: what was being presented at the time as the first direct evidence for cosmic inflation and the existence of gravitational waves.
Scientists at a South Pole research centre announced that they had identified evidence supporting the theory of cosmic inflation, which they said had been made possible through the direct observation of gravitational-wave signatures. By examining data from the cosmic microwave background, the researchers reported detecting a distinctive pattern in this extremely faint radiation left over from the Big Bang. [source] [source] [source]
Just as waves on water carry energy from one place to another, gravitational waves carry energy through the universe. The possibility of such waves had been proposed by Albert Einstein in his theory of relativity. [source] [source]
The importance attributed to the announcement was its potential contribution to theories about the origin of the universe. Einstein had predicted gravitational waves, but the article notes that direct evidence had not previously been obtained. Cosmic inflation is described as the exponential expansion of the universe shortly after the Big Bang. [source]
Quoting contemporary BBC reporting, the original article described the result as one of the most important discoveries in astronomy and physics and said it could allow scientists, metaphorically, to hear an echo of the Big Bang after 13.82 billion years. The author saw the finding as potentially helping answer fundamental questions about why and how the universe came into existence. [source]
The article also explains that this was not the first evidence associated with gravitational waves. Earlier indirect evidence from Russell Hulse and Joseph Taylor connected gravitational-wave emission with the shrinking orbit of a binary pulsar; that work earned them the 1993 Nobel Prize in Physics. For that reason, the author notes that many commentators regarded a direct detection of gravitational waves together with evidence for inflation as potentially Nobel-worthy.
Importantly, the original article explicitly cautions that the researchers' result had not yet undergone scientific peer review and needed confirmation by independent methods. It specifically mentions data from the Planck space telescope as a possible independent test, while stating the author's expectation at the time that the result would probably be confirmed. [source]
The original source and BICEP/Keck links are preserved below. [source] [source]