Heliocentric velocities M81 and M82 in different frames of reference
The heliocentric radial velocities of Messier 81 (M81) and Messier 82 (M82)—corrected for the motion of the Sun relative to these galaxies—are
Read moreAndrew Thornett, Lichfield, England, M6THO, andrew (at) thornett (dot) net
The heliocentric radial velocities of Messier 81 (M81) and Messier 82 (M82)—corrected for the motion of the Sun relative to these galaxies—are
Read moreGNU Radio can be installed from: https://github.com/gnuradio There are different releases for different operating systems and the Windows version is
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Read moreTo open Command Prompt as Administrator in Windows, follow one of these methods: ✅ Method 1: From Start Menu (most common)
Read moreOriginal PowerPoint downloadable from link below. One thing I missed in it was to say that all monitor screens near
Read moreOriginal Powerpoint file by myself downloadable from link below. https://www.astronomy.me.uk/wp-content/uploads/2025/07/NanoVNA_Hydrogen_Line_Basics.pptx
Read moreAt 22 GHz, the most prominent masers are water (H₂O) masers, specifically: 🔹 Water (H₂O) Maser at 22.23508 GHz 🔍 Astrophysical
Read moreTo build a 22 GHz water maser receiver, you’ll be targeting the 22.23508 GHz emission line, which is in the K-band of the
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