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
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astronomy.network The Website of Lichfield Radio Observatory (LRO)
Andrew Thornett, Lichfield, England, M6THO, andrew (at) thornett (dot) net
Installing GNU Radio & additional radio astronomy files
GNU Radio can be installed from: https://github.com/gnuradio There are different releases for different operating systems and the Windows version is
Read moreEffect of oxidation on electrical conductivity of copper tape used on antennae
Copper tape that has oxidized to form copper oxide is much less electrically conductive than pure metallic copper — in fact, copper(I)
Read moreTo open Command Prompt as Administrator in Windows
To open Command Prompt as Administrator in Windows, follow one of these methods: ✅ Method 1: From Start Menu (most common)
Read moreInstalling CASA under Ubuntu
To install CASA (Common Astronomy Software Applications) on Ubuntu, follow these steps. CASA is commonly used in radio astronomy, especially for
Read moreCASA and GUIs
CASA does have a GUI, but the availability and scope of the GUI depend on the version you’re using: 🧱 Classic
Read moreWhat is difference between triplet astrograph with dedicated field flattened and quadruplets astrograph?
The difference between a triplet astrograph with a dedicated field flattener and a quadruplet astrograph mainly comes down to optical
Read moreReducing noise in radio telescope systems
Original PowerPoint downloadable from link below. One thing I missed in it was to say that all monitor screens near
Read moreIntroduction to using NanoVNA
Original Powerpoint file by myself downloadable from link below. https://www.astronomy.me.uk/wp-content/uploads/2025/07/NanoVNA_Hydrogen_Line_Basics.pptx
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