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


murphyfig1

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.

Youtube.com Search “DARC Skynet”
Facebook.com Search “DARC Skynet”
Twitch.tv Search “KE5ICX”

Direct Video Link: https://www.youtube.com/channel/UCishlh8WmW7OXy9Q6sxsaag

Yahoo Groups: http://groups.yahoo.com/group/skynet
Facebook: http://www.facebook.com/groups/306498286059167/
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
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37135327_2559279924098175_2456214156458590208_n.jpg?_nc_cat=0&oh=f4dd5d5cba00f96395c1614d577415ba&oe=5BD99CA1

Photo #2 Stellar Parallax Motion from Annual Parallax
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37200794_2559279784098189_8690419938914992128_n.jpg?_nc_cat=0&oh=41ac807f1a1f10f089200e9723b68c1c&oe=5BDC9469

Photo #3 Stellar Parallax Schematic
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37107227_2559279710764863_6119992083680854016_n.jpg?_nc_cat=0&oh=88cd7ca59b4a08851bea1b2904300a62&oe=5BA1891B

Photo #4 Proxima Centauri Parallax
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37133153_2559279847431516_865723067362443264_n.jpg?_nc_cat=0&oh=0c117c537fd3d102dc7aff0e5558e8e2&oe=5BC95FE0

Photo #5 Mathematical Discussion 1
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37189661_2559279797431521_6186284014836383744_n.jpg?_nc_cat=0&oh=fedb5948804aaceba5ed0a007a5dc4de&oe=5B9E9A5D

Photo #6 Parallax Trigonometric Formula
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37107928_2559279697431531_6765717382724845568_n.jpg?_nc_cat=0&oh=b69aef3bd8b595a779582e9cdbe2e63b&oe=5BE04830

Photo #7 Mathematical Discussion 2
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37188694_2559279720764862_4024863326809882624_n.jpg?_nc_cat=0&oh=0844bdb3ad51db38606e6d1d1d699a52&oe=5BE9900E

Photo #8 Hubble Parallax
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37204395_2559279907431510_5633671055559098368_n.jpg?_nc_cat=0&oh=cf9484ce57d87ee6b8dac920f52d5587&oe=5BDB655E

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
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37242382_2559215930771241_810555874597666816_n.jpg?_nc_cat=0&oh=3a47e67e8b26fdadb8a16e7471ede66e&oe=5BCCA77A

Photo #1 Libra Stars and Location of HD-140283
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37140928_2559216720771162_4620013032301395968_n.jpg?_nc_cat=0&oh=afb4be291b74f7a7b67e92bc7a0d6a99&oe=5BC94EAC
Photo #2 Methuselah (HD-140283)
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37107908_2559216724104495_3580651717131239424_n.jpg?_nc_cat=0&oh=cab4b4890b7c5907da2ba41de0b559f4&oe=5BD38E39

Photo #3 Gliese-581
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37178576_2559216760771158_8018567709564338176_n.jpg?_nc_cat=0&oh=74543b0340b382a47b52fb3bddf0bbe5&oe=5B9FD9B0

Photo #4 Barred Spiral Galaxy (NGC 5792)
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37079297_2559216784104489_6268371916583600128_n.jpg?_nc_cat=0&oh=24e539a1c7dc8c2502ab7deee2c4095f&oe=5BD0ABDA

Photo #5 Globular Cluster (NGC 5897)
https://scontent-dfw5-2.xx.fbcdn.net/v/t1.0-9/37243192_2559216797437821_6025468147077742592_n.jpg?_nc_cat=0&oh=eb93e64175f130ff5d062b0cf01fa95a&oe=5BE1F2A4

Recent Astronomical discoveries

Could Gravitational Waves Reveal How Fast Our Universe is Expanding?
https://www.sciencedaily.com/releases/2018/07/180712114434.htm

Breakthrough in the Search for Cosmic Particle Accelerators
https://www.sciencedaily.com/releases/2018/07/180712114525.htm

Space Exploration and Space History

Double asteroid discovery

Animation of double asteroid: https://photojournal.jpl.nasa.gov/archive/PIA22559.gif

Possible new volcano on Io

Io hot spot: https://www.jpl.nasa.gov/spaceimages/images/largesize/PIA22601_hires.jpg

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