Short answer: it scales linearly with wavelength.Longer answer (the bit you actually care about 🙂): For a hydrogen-line horn (≈1420 MHz, λ ≈ 21 cm), the flare geometry is set…
Following is result of asking ChatGPT the above question 27/1/2026!!!! Here’s a source that actually describes the original SETI Horn of Plenty antenna design and its dimensions: 🔗 SETI League…
These are both relatively long integration times on the Intel i5 MiniPC used for this experiment. The numbers are not equivalent – in both cases I attempted to obtain an…
Screenshot: Data Collection Videos: Data Files: https://www.astronomy.me.uk/wp-content/uploads/2026/01/LRO-H2_ezColGR260104GR_260123_13.txt https://www.astronomy.me.uk/wp-content/uploads/2026/01/LRO-H2_ezColGR260104GR_260123_14.txt https://www.astronomy.me.uk/wp-content/uploads/2026/01/LRO-H2_ezColGR260104GR_260124_00.txt
Short answer: it increases by a factor of 4. Here’s why (under the usual physics assumptions): So if the object shrinks to half it’s size: To keep constant: Angular momentum…
It is often stated that pulsar timings are very stable and hence used as a cosmic clock by astronomers. Yet, on a live demonstration at Dwingaloo Observatory in Netherlands tonight,…
There is no single officially published, modern value for the system temperature (Tsys) or SEFD of the 25 m Dwingeloo radio telescope that’s easy to point to. What follows is…
ezRA’s ezGLon.py program studies cross sections of the Milky Way, along one Galactic Longitude (GLon). ezRA’s ezGLon.py program processes *GLon.npz files. Above, the ezGLon.py program errored because it found *Gal.npz…
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