More about AAAP
Affiliated Organizations
Interested in Becoming a Keyholder?
AAAP members interested in becoming keyholders should contact Larry Kane or Dave Skitt.Announcements
Slides from Lectures
Yerkes Objective
by John Church, Phd.The Megaconstellation Threat
by Dr. Paul DanielsLight Ordinances (Example)
Subscribe to Sidereal Times:
January 2026 M T W T F S S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -
Recent Posts
Top Posts
Monthly Issues
- April 2011 (10)
- April 2012 (10)
- April 2013 (14)
- April 2014 (1)
- April 2014 (10)
- April 2015 (12)
- April 2016 (10)
- April 2017 (9)
- April 2018 (2)
- April 2018 (5)
- April 2019 (8)
- April 2020 (12)
- April 2021 (6)
- April 2022 (12)
- April 2023 (10)
- April 2024 (8)
- April 2025 (8)
- astrophoto (2)
- August 2012 (7)
- August 2015 (4)
- Best of (1)
- December 2010 (7)
- December 2011 (4)
- December 2011 (4)
- December 2012 (6)
- December 2013 (9)
- December 2014 (8)
- December 2015 (4)
- December 2016 (7)
- December 2017 (7)
- December 2018 (8)
- December 2019 (8)
- December 2020 (5)
- December 2021 (10)
- December 2022 (9)
- December 2023 (8)
- December 2024 (6)
- December 2025 (6)
- February 2011 (7)
- February 2012 (10)
- February 2013 (7)
- February 2014 (8)
- February 2015 (9)
- February 2016 (1)
- February 2017 (8)
- February 2018 (8)
- February 2019 (11)
- February 2020 (7)
- February 2021 (8)
- February 2022 (10)
- February 2023 (8)
- February 2024 (8)
- February 2025 (6)
- Great conjunction (6)
- January 2011 (6)
- January 2012 (8)
- January 2013 (7)
- January 2014 (8)
- January 2015 (9)
- January 2016 (10)
- January 2017 (7)
- January 2018 (8)
- January 2019 (12)
- January 2020 (9)
- January 2021 (9)
- January 2022 (9)
- January 2023 (8)
- January 2024 (6)
- January 2025 (10)
- January 2026 (8)
- July 2015 (1)
- June 2011 (7)
- June 2012 (9)
- June 2013 (10)
- June 2014 (10)
- June 2015 (9)
- June 2016 (7)
- June 2017 (6)
- June 2018 (7)
- June 2018 (2)
- June 2019 (10)
- June 2020 (10)
- June 2021 (13)
- June 2022 (9)
- June 2023 (9)
- June 2024 (5)
- June 2025 (8)
- March 2011 (8)
- March 2012 (10)
- March 2013 (9)
- March 2014 (9)
- March 2015 (12)
- March 2016 (6)
- March 2017 (8)
- March 2018 (1)
- March 2018 (9)
- March 2019 (8)
- March 2020 (15)
- March 2021 (7)
- March 2022 (8)
- March 2023 (10)
- March 2024 (12)
- March 2025 (11)
- May 2011 (6)
- May 2012 (7)
- May 2013 (12)
- May 2014 (8)
- May 2015 (12)
- May 2016 (7)
- May 2017 (7)
- May 2018 (2)
- May 2018 (8)
- May 2019 (9)
- May 2020 (9)
- May 2020 (3)
- May 2021 (4)
- May 2022 (7)
- May 2023 (7)
- May 2024 (11)
- May 2025 (11)
- Mid Summer 2018 (8)
- Mid Summer 2019 (11)
- Mid-Summer 2013 (8)
- Mid-summer 2014 (11)
- Mid-summer 2016 (4)
- Mid-summer 2016 (1)
- Mid-summer 2017 (8)
- Mid-summer 2020 (12)
- Mid-summer 2021 (7)
- Mid-summer 2022 (10)
- Mid-summer 2023 (5)
- Mid-summer 2024 (5)
- Mid-summer 2025 (7)
- moon (1)
- November 2010 (10)
- November 2011 (8)
- November 2012 (9)
- November 2013 (9)
- November 2014 (12)
- November 2015 (6)
- November 2016 (5)
- November 2017 (8)
- November 2018 (1)
- November 2018 (10)
- November 2019 (11)
- November 2020 (8)
- November 2021 (9)
- November 2022 (8)
- November 2023 (5)
- November 2024 (13)
- November 2025 (7)
- October 2011 (7)
- October 2012 (11)
- October 2013 (9)
- October 2014 (10)
- October 2015 (4)
- October 2016 (9)
- October 2017 (7)
- October 2018 (8)
- October 2018 (1)
- October 2019 (2)
- October 2019 (6)
- October 2020 (7)
- October 2021 (8)
- October 2022 (9)
- October 2023 (15)
- October 2024 (11)
- October 2025 (12)
- September 2011 (10)
- September 2012 (1)
- September 2013 (7)
- September 2014 (10)
- September 2015 (8)
- September 2016 (6)
- September 2017 (12)
- September 2018 (10)
- September 2019 (2)
- September 2019 (8)
- September 2020 (6)
- September 2022 (9)
- September 2023 (10)
- September 2024 (7)
- September 2025 (9)
- Sidereal Times (1,319)
- "program chair"
- 50th anniversary
- aaap merchandise
- agarwal
- allen
- assistant director
- astroimaging
- astronomy
- astrophotography
- bernardis
- board
- board meeting
- book reviews
- church
- curiosity
- d'angelo
- davis
- DiMario
- director
- eclipse
- eclipse 2017
- fanning
- frimet
- ganti
- gray
- guest speakers
- Hastings-Byrne
- hubble
- india
- jupiter
- kane
- kaplan
- kremer
- letcher
- levy
- ludy
- Mars
- meeting
- meeting minutes
- merchandise
- miller
- minutes
- mitrano
- moon
- murray
- NASA
- observatory
- Orion
- otto
- outreach
- parker
- physicist
- planets
- poetry
- poinsett
- polans
- princeton
- program
- ramsey
- research astronomer
- Rex Parker
- science
- secretary
- secretary minutes
- Sherman
- skitt
- snippets
- spacex
- speaker
- starquest
- treasurer
- uacnj
- vanderbei
- venus
- wright
Meta
Tag Archives: hubble equation
Impact of Relativity on the Hubble Equation
by William H. Davis The Hubble equation v=Ho/dv= H_o/d is commonly used to estimate distances to distant objects emitting light. The observations by a number of astronomers, even before Hubble, recognized a relationship between velocity and distance of nearby objects. … Continue reading
Amateur Astronomers Association of Princeton 