Explore Alliance Events: 2020 Mount Wilson Observatory Star Party and JPL Experience - July 17th - 19th

$ 150.00

This Event has Been Cancelled due to COVID, and Will be Rescheduled

 Explore Alliance Members assemble in front of the Historic 100-inch Hooker Reflecting Telescope at Mt. Wilson Observatory

Saturn captured in 2018 by Wil Young through the eyepiece of the 60-inch at Mt. Wilson Observatory


“What a great event, Scott. I am looking forward to the next one already.“

-Matthias Schmitt

"I want to thank the whole ES team.  I had a terrific time.  While of course I wish we could have had better weather, I still think of the day as a highlight of my astronomical hobby...The spectography lecture was solid and interesting. David's [Levy] was surprisingly human, and a real pleasure, especially following two pretty technical lectures.  The tour of the facilities was a highlight for sure. I have already signed up for next year."

-Christopher Grisanti

"It was a true honor for me to speak in such a near mythically historical location. Great thanks especially to Steve [Edberg] for bringing his superb spectral demo box (and his willingness to don the lab coat!)"

-Claude Plymate, Telescope Engineer and Chief Observer for the Big Bear Solar Observatory


The Explore Alliance is honored to announce that we will conduct yet another astronomy and space exploration awareness experience unlike any other at the Jet Propulsion Laboratory and at historic Mount Wilson Observatory with the 60-inch Telescope, and the historic solar telescopes, the Snow and the 150 Foot Tower.

These exclusive, rare, and intimate engagements will be conducted starting July 17th through the 19th at JPL and at Mt. Wilson Observatory, with a backup night on the 19th (To give one more chance of viewing in case of poor weather).

Explore Alliance Invites you to Tour the Jet Propulsion Laboratory

Participation is limited which will give you generous observing time and a once in a lifetime opportunity to interact through the observing session with our amazing group of speakers.

This event is perfect for anyone, beginners to experienced who share a passion for exploring the cosmos, and it will be a very rare opportunity to observe the planets and the cosmos with the iconic and historic 60-inch Telescope in the company of these legendary space explorers and astronomers. 


This annual event has included some amazing speakers including: 

Dr. Tom Spilker (JPL Planetary Scientist - Voyager Mission; Cassini Mission)

Dan Koehler (Director and Astronomer - Yerkes Observatory)

Alberto Levy (Astronomy Research in Mexico)

Claude Plymate (Chief Astronomer at Big Bear Solar Observatory)

Dr. Stephen J. Edberg (Retired JPL Scientist, Astronomer, Planetary Scientist)

Dr. David H. Levy (Author, Comet Discoverer)

And the 2020 Event will deepen your understanding of the universe even further with these featured speakers:



Mt. Wilson Session Director - Tim Thompson

Tim Thompson Mt. Wilson Observatory Session Director

Tim’s breadth of knowledge and experience in professional and amateur astronomy is vast. He has been the Session Director for the historic 60-inch Telescope for over three decades and his familiarity of the observatory complex is second to none. He will conduct the special tour of Mt. Wilson for the attendees and guide them through the stars with the massive telescope.

December 26, 1912, the 60-inch telescope Mount Wilson with Astronomer Wendell Hoge.

Your Telescope for the Night, the Venerable and Historic 60-inch

As you climb the stairs into the observatory dome, you will pass by the original lockers that still bear the names of the astronomers that used one of the most productive and successful telescopes in astronomical history, the 60-inch Telescope. Designed by George Willis Ritchey the 60-inch heralded the innovations that all modern telescopes today are influenced by. It was built under the guidance of George Ellery Hale who received the 60-inch (1.5 m) mirror blank, cast by glass manufacturer Saint-Gobain in France in 1896 as a gift from William Hale, his father. Hale finally received funding from Carnegie eight years later to begin work on the telescope with mirror grinding and polishing by Ritchey with First Light occurring in 1908. The 60-inch Telescope has been in continuous use almost every clear night to this day since its inception, and was the world™s largest operational telescope until Hale went on to complete the Mt. Wilson 100-inch telescope in 1918.

The 60-inch was used by a long list of iconic astronomers including George Ellery Hale, Edwin Hubble, Bade, and Shapely who joined the staff at Mt. Wilson in 1914. HIs study of the distribution of globular clusters in the Milky Way proved that our solar system did not lie in the center of our galaxy as was commonly believed, deducing that the Sun lies at a distance of 30,000 light years from the galactic center. Harlow Shapely's work with the 60-inch Telescope led to the first realistic estimate for the actual size of the Milky Way Galaxy, thus was a milestone in galactic astronomy.

Although there are few larger telescopes that are used for public observations, the telescope's diffraction-limited aperture of 60-inches, and the routinely good seeing conditions of Mt. Wilson may be one of the world's best visual instruments available anywhere. You will be treated to unforgettable super high-resolution views of the galaxies, nebulae, globular star clusters, planetary nebulae, and solar system objects. Objects like Saturn reveal subtleties and splits in the Rings that are rarely directly seen, amazing features and hues on Mars will leave you stunned. Because of the shear aperture of the telescope combined with proper eyepieces you can directly see vivid colors in planetary nebulae and intense color saturation in many stars is undeniable. 

For those familiar with using telescopes, the 60-inch (1524mm aperture) has a focal length of 24,384mm.  There are several specialized eyepieces used on the telescope's 4-inch focuser including the Explore Scientific 30mm 100 Degree Series Waterproof Eyepiece, which produces 813X producing a 7.4 arc minute true field of view. 

Commemorative Items and Door Prizes

All Participants will receive a special Mt. Wilson Astronomer Certificate signed by the Session Director and the Telescope Operator to remember your Explore Scientific Experience at Mount Wilson, and you will receive a ticket for the chance to win valuable door prizes with easy odds since this is a small group!

Schedule: July 17th, 2020 - Friday

  • 9:00 a.m. - 9:30 a.m.    Parking and Orientation at the Jet Propulsion Laboratory Visitor Parking Lot
  • 9:50 a.m. Check-in at the JPL Reception Area
  • 10:00 a.m. Meet and greet with JPL Staff who will conduct the Tour
  • More details to come...

Schedule: July 18th, 2020 - Saturday

  • 10:00 a.m. - 10:30 a.m.    Parking and Orientation at the 60-inch Dome with overflow parking in the main parking lot below; Walk to the Mt. Wilson Museum Google Map
  • 10:30 a.m. - 12:00 p.m.    Lecture
  • 12:00 p.m. - 1:00 p.m.      Lunch with our Speakers and Session Staff
  • 1:00 p.m. - 2:30 p.m.        Lecture
  • 2:30 p.m. - 3:00 p.m.        Door Prizes
  • 3:00 p.m. - 4:30 p.m.        Lecture
  • 4:30 p.m. - 7:00 p.m.        Special Tour of Mt. Wilson Observatories
  • 7:00 p.m. - 8:00 p.m.        Light Dinner and Refreshments in the 60-inch Dome; Orientation with the 60-inch
  • 8:00 p.m. - 1:00 a.m.        60-inch Telescope Observing Session

Schedule: July 19th, 2020 - Sunday

  • TBA

Observing Session with the 60-inch Telescope

  • Sunset:            
  • Moon Phase:   7.2% Illumination; Waning Crescent
  • Moon Set:        
  • Site Location:   Mt. Wilson Observatory 60-inch Telescope; Lat: 34:13:33 N Long: 118:03:26 W; Google Map
  • Time Zone:      -08 Hours from GMT
  • Observing:       8:00 p.m. to 1:00 a.m.
  • Object List:      Suggestions by the Observers, Suggestions by the Telescope Operators



CA Residents: Prop 65 WARNING(S)

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