The discussion centers on the logarithmic map of the universe, emphasizing its accuracy relative to Earth. Participants express interest in the map and its implications for understanding cosmic distances. Questions arise about the meaning of "parsecs" and the units used on the horizontal axis, which may represent time. It is suggested that the horizontal axis divides Earth's circumference into 24 hours, correlating to 360 degrees. The conversation highlights the need for clarity on the map's units and their significance in astronomical contexts.
It doesn't say what the units at he bottom are but it looks like they've divided the Earth's circumfenrce into 24 hours. (i.e. 24 hours = 360 degrees).
Partial solar eclipse from Twizel, South Isl., New Zealand ...
almost missed it due to cloud, didnt see max at 0710 NZST as it went back into cloud.
20250922, 0701NZST
Canon 6D II 70-200mm @200mm,
F4, 100th sec, 1600ISO
Makeshift solar filter made out of solar eclipse sunglasses
Is a homemade radio telescope realistic?
There seems to be a confluence of multiple technologies that makes the situation better than when I was a wee lad: software-defined radio (SDR), the easy availability of satellite dishes, surveillance drives, and fast CPUs.
Let's take a step back - it is trivial to see the sun in radio. An old analog TV, a set of "rabbit ears" antenna, and you're good to go. Point the antenna at the sun (i.e. the ears are perpendicular to it) and there is...
This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed).
n.b. I start this...