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GW170817 was a gravitational wave (GW) signal observed by the LIGO and Virgo detectors on 17 August 2017, originating from the shell elliptical galaxy NGC 4993, about 140 million light years away. The signal was produced by the last moments of the inspiral process of a binary pair of neutron stars, ending with their merger. It was the first GW ...
Originally classified as comet C/2017 U1, it was later reclassified as asteroid A/2017 U1 due to the absence of a coma. Once it was unambiguously identified as coming from outside the Solar System, a new designation was created: I, for Interstellar object. As the first object so identified, ʻOumuamua was designated 1I, with rules for the ...
Lorimer Burst – Observation of the first detected fast radio burst as described by Lorimer in 2006. [1] [failed verification]In radio astronomy, a fast radio burst (FRB) is a transient radio pulse of length ranging from a fraction of a millisecond, for an ultra-fast radio burst, [2] [3] to 3 seconds, [4] caused by some high-energy astrophysical process not yet understood.
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Early efforts have been able to detect radio emissions (sometimes called RRAT flashes) [13] for less than one second a day, and, like with other single-burst signals, one must take great care to distinguish them from terrestrial radio interference. Distributing computing and the Astropulse algorithm may thus lend itself to further detection of ...
Wow! Reply (2012), three transmissions to Hipparcos 34511, Hipparcos 33277 and Hipparcos 43587 in reply to the Wow! signal [7] Lone Signal (2013) A Simple Response to an Elemental Message [8] (2016) Sónar Calling GJ273b (2017) [9] [10] Along with serious IRM projects, a number of pseudo-METI [11] projects also exist: Poetica Vaginal (1986) [12]
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At Pluto's distance, radio signals from the space probe back to Earth took four hours and 25 minutes to traverse 4.7 billion km of space. ... On June 23, 2017, ...