Skynet 7-14-18 Parallax Distances Explained! & Tour of Constellation Libra 9PM CT


SKYNET!!!! 9PM CT – 10:30PM CT

Saturday’s Topic: “Parallax Distances Explained!” and “Tour of the Constellation Libra”

Net Controls: Mike KG5P & Tom KE5ICX
Afterglow Movie 10:30PM:
“Ice Planet” (2001)
2-Meter Repeater W5FC: 146.880MHz, PL 110.9, –
Echolink: W5FC-R, node 37247. Search “DARC Skynet” Search “DARC Skynet” Search “KE5ICX”

Direct Video Link:

Yahoo Groups:
Saturday’s DARC SkyNet is at 9PM CT.

Discussion topic of the evening.

Astronomical Parallax – Mike KG5P

1. What is parallax in general?
2. How is it used to determine distances to astronomical objects.
3. Provide some back-of-the envelope calculations of examples.
4. Describe its limitations.
6. Describe other methods of determining astronomical distances.

Photo #1 Parallax Displacement from Earth’s Relative Location

Photo #2 Stellar Parallax Motion from Annual Parallax

Photo #3 Stellar Parallax Schematic

Photo #4 Proxima Centauri Parallax

Photo #5 Mathematical Discussion 1

Photo #6 Parallax Trigonometric Formula

Photo #7 Mathematical Discussion 2

Photo #8 Hubble Parallax

What can you see in the sky over the next couple of weeks?

West, One Hour After Sunset

A featured constellation or object(s) or topic.

Constellation Libra

Photo #1 Libra Stars and Location of HD-140283
Photo #2 Methuselah (HD-140283)

Photo #3 Gliese-581

Photo #4 Barred Spiral Galaxy (NGC 5792)

Photo #5 Globular Cluster (NGC 5897)

Recent Astronomical discoveries

Could Gravitational Waves Reveal How Fast Our Universe is Expanding?

Breakthrough in the Search for Cosmic Particle Accelerators

Space Exploration and Space History

Double asteroid discovery

Animation of double asteroid:

Possible new volcano on Io

Io hot spot: