Saturday, December 9, 2023

Halley's Comet Aphelion - Farthest from Sun

Halley's Comet, as seen from Easter Island on 1986 March 8; photographer: W. Liller (International Halley Watch, Large Scale Phenomena Network).

(Image Sources: NASA,, By NASA/W. Liller - NSSDC's Photo Gallery (NASA):, Public Domain, 

By Glenn A. Walsh

Reporting for SpaceWatchtower

TODAY (Saturday, 2023 December 9) marks Aphelion for Comet Halley, the comet's farthest point in their orbit of the Sun. Halley's Comet's last Perihelion, their closest approaches to the Sun and Earth, came in 1986. Halley's Comet's next Perihelion will come in 2061.

1910 – Astronomer John Brashear shows Halley's Comet to the general public, using telescopes in Pittsburgh's Riverview Park, on the front lawn of the Allegheny Observatory.

1985 & 1986 – Pittsburgh's Buhl Science Center shows Halley's Comet to the general public, using telescopes in the original Buhl Planetarium Observatory, including the historic 10-inch Siderostat-type Refractor Telescope.

2023 December 9 – Halley's Comet reaches Aphelion.

2061 July 28 – Next Halley's Comet Perihelion.

Internet Links to Additional Information ---

Halley's Comet: Link >>>'s_Comet

StarDate - "Distant Comet": Link >>>

Source: Glenn A. Walsh Reporting for SpaceWatchtower, a project of Friends of the Zeiss          

               Saturday, 2023 December 9.

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Glenn A. Walsh, Informal Science Educator & Communicator                                                             (For more than 50 years! - Since Monday Morning, 1972 June 12):
Link >>>
Electronic Mail: < >
Project Director, Friends of the Zeiss: Link >>>
SpaceWatchtower Editor / Author: Link >>>
Formerly Astronomical Observatory Coordinator & Planetarium Lecturer, original Buhl Planetarium & Institute of Popular Science (a.k.a. Buhl Science Center), America's fifth major planetarium and Pittsburgh's science & technology museum from 1939 to 1991.
Formerly Trustee, Andrew Carnegie Free Library and Music Hall, Pittsburgh suburb of Carnegie, Pennsylvania, the fourth of only five libraries where both construction and endowment funded by famous industrialist & philanthropist Andrew Carnegie.
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh: Link >>> Buhl Observatory: Link >>>
* Adler Planetarium, Chicago: Link >>>
* Astronomer, Educator, Optician John A. Brashear: Link >>>
* Andrew Carnegie & Carnegie Libraries: Link >>>

 * Other Walsh-Authored Blog & Web-Sites: Link >>>

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