The heliocentric radial velocities of Messier 81 (M81) and Messier 82 (M82)—corrected for the motion of the Sun relative to these galaxies—are as follows: 🌌 M81 (Bode’s Galaxy) 🌌 M82…
GNU Radio can be installed from: https://github.com/gnuradio There are different releases for different operating systems and the Windows version is called radioconda – this and Linux and Mac releases can…
Copper tape that has oxidized to form copper oxide is much less electrically conductive than pure metallic copper — in fact, copper(I) oxide (Cu₂O) and copper(II) oxide (CuO) are both…
To open Command Prompt as Administrator in Windows, follow one of these methods: ✅ Method 1: From Start Menu (most common) ✅ Method 2: Using Run Dialog You’ll know it…
To install CASA (Common Astronomy Software Applications) on Ubuntu, follow these steps. CASA is commonly used in radio astronomy, especially for data from instruments like ALMA and the VLA. ✅…
CASA does have a GUI, but the availability and scope of the GUI depend on the version you’re using: 🧱 Classic CASA (CASA 5.x or CASA 6 monolithic bundle) ✅…
The difference between a triplet astrograph with a dedicated field flattener and a quadruplet astrograph mainly comes down to optical design, performance, and ease of use. Here’s a clear breakdown:…
Original PowerPoint downloadable from link below. One thing I missed in it was to say that all monitor screens near telescope or aerial should be switched off and linear power…
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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