4 posts tagged with astronomy by cgc373.
Displaying 1 through 4 of 4.
Listening at Two Very Different Scales
Large-scale listening: To ensure that DSS-43 can still place the longest of long-distance calls, the antenna underwent a round of updates in 2020. A new X-band cone was installed. DSS-43 transmits radio signals in the X (8 to 12 gigahertz) and S (2 to 4 GHz) bands; it can receive signals in the X, S, L (1 to 2 GHz), and K (12 to 40 GHz) bands. The dish’s pointing accuracy also was tested and recertified. 1200 words from Willie D. Jones for IEEE Spectrum.
Small-scale listening: The sounds being produced are within the lower range of human hearing, so it’s possible there are sounds in the soil we haven’t heard yet. Early research from Switzerland shows soils were producing the most complex sounds in spring and summer, which declined in autumn and winter. Phoebe Weston writes 1000 words for The Guardian.
Something in space has been lighting up every 20 minutes since 1988
On Wednesday, researchers announced the discovery of a new astronomical enigma. The new object, GPM J1839–10 [...] takes 22 minutes between pulses. [...] The list of known objects that can produce this sort of behavior is short and consists of precisely zero items. John Timmer writes 900 words for Ars Technica.
Astropanel - Astronomy program for the terminal
This program will help you decide when to bring out your telescope. Command-line software by Geir Isene.
Oliver Morton on The Wonder of Quasars
In the far reaches of the sky there are sun-bright discs as wide as solar systems, their hearts run through by spears of radiation that outshine galaxies. The energies that feed these quasars beggar all metaphor, and their quantification seems all but meaningless. What does it serve to know that they are converting matter to energy at a rate that equates to the complete annihilation of a planet the size of the Earth ten times a second? Or that all the fires of the sun, from its birth to its death, would be a few weeks' worth of work to one of them? No human sense can be made from so inhuman a scale. Boggle, and move on. [via 3quarksdaily] [more inside]
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