---
title: "Operation Moonwatch"
chunk: 2/2
source: "https://en.wikipedia.org/wiki/Operation_Moonwatch"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T04:15:22.984256+00:00"
instance: "kb-cron"
---

Sputnik 1's sudden launch was followed less than a month later with the Soviets orbiting Sputnik 2 and the dog Laika. It was Moonwatch teams, networked around the world, who provided tracking information needed by scientists in Western nations. For the opening months of the Space Age, members of Moonwatch were the only organized worldwide network that was prepared to spot and help track satellites. The information they provided was complemented by the radio tracking program called Minitrack the United States Navy operated as well as some information from amateur radio buffs.
In many cases, Moonwatch teams also had the responsibility of communicating news of Sputnik and the first American satellites to the public.  The public responded, in turn, with infectious enthusiasm as local radio stations aired times to spot satellites and local and national newspapers ran hundreds of articles that described the nighttime activities of Moonwatchers.
Moonwatch caught the attention of those citizens interested in science or the Space Race during the late 1950s and much of the general public as well. Newspapers and popular magazines featured stories about Moonwatch regularly; dozens of articles appeared in the Los Angeles Times, The New Yorker, and the New York Times alone.  Meanwhile, in the U.S. local businesses sponsored teams with monikers like Spacehounds and The Order of Lunartiks. Meanwhile, Moonwatch teams in Peru, Japan, Australia, and even the Arctic regularly sent their observations to the Smithsonian.
Moonwatch complemented the professional system of satellite tracking stations that Fred Whipple organized around the globe. These two networks – one composed of amateurs and the other of seasoned professionals – helped further Whipple's personal goals of expanding his own astronomical empire. Operation Moonwatch was the most successful amateur activity of the IGY and it became the public face of a satellite tracking network that expanded the Smithsonian's global reach. Whipple used satellite tracking as a gateway for his observatory to participate in new research opportunities that appeared in the early years of space exploration.
In February 1958, President Dwight D. Eisenhower publicly thanked the SAO, Fred Whipple, and the global corps of satellite spotters that comprised Moonwatch for their efforts in tracking the first Soviet and American satellites.

== Moonwatch after the IGY ==

Even after the IGY ended, the Smithsonian maintained Operation Moonwatch. Hundreds of dedicated amateur scientists continued to help NASA and other agencies track satellites. Their observations often rivaled those of professional tracking stations, blurring the boundary between professional and amateur.  Moonwatch members and the Smithsonian were important contributors to US Department of Defense satellite tracking research and development efforts, 1957–1961; see Project Space Track.
Moonwatch continued long after the IGY ended in 1958. In fact, the Smithsonian operated Moonwatch until 1975 making it one of the longest running amateur science activities ever. As the fad of satellite spotting passed, the Smithsonian refashioned Operation Moonwatch to perform new functions. It encouraged teams of dedicated amateurs to contribute increasingly precise data for satellite tracking. Moonwatchers adapted to the needs of the Smithsonian through the activities of "hard core" groups in places like Walnut Creek, California. Throughout the 1960s, the Smithsonian gave them ever more challenging assignments such as locating extremely faint satellites and tracking satellites as they re-entered the Earth's atmosphere.
At times, the precise observations and calculations of dedicated skywatchers surpasses the work of professionals.
One of the most notable activities of Moonwatchers after the IGY was the observance of Sputnik 4 when it reentered the atmosphere in September 1962. Moonwatchers and other amateur scientists near Milwaukee, Wisconsin observed the flaming re-entry and their observations eventually led to the recovery and analysis of several fragments from the Soviet satellite.

== Moonwatch's legacy ==
Moonwatch affected the lives of participants long after they stopped looking for satellites. When the Smithsonian discontinued the program in 1975, one long-time Moonwatcher compared his participation to "winning the Medal of Honor." Moonwatch inspired some future scientists, for example, James A. Westphal, a Moonwatcher from Oklahoma, who eventually helped design instruments for the Hubble Space Telescope at Caltech. The program boosted science programs at many schools throughout the country and helped revitalize amateur science in the United States.
The United States Space Surveillance Network and other modern tracking systems are professional and automated, but amateurs remain active in satellite watching.

== References ==

== Further reading ==
Gavaghan, Helen. (1998) Something New Under the Sun: Satellites and the Beginning of the Space Age, Copernicus, ISBN 0-387-94914-3, pg 38–42 & 49
Hayes, E. Nelson. (1968) Trackers of the Skies. Cambridge, Massachusetts: Howard A. Doyle Publishing Co.
McCray, W. Patrick. (2008) Keep Watching the Skies! The Story of Operation Moonwatch and the Dawn of the Space Age, Princeton University Press.

== External links ==
Smithsonian Astronomers Keep Hectic Pace – The Harvard Crimson
The IGY Period – University of Hawaii
Role of NAS and TPESP, 1955–1956 – NASA
The tracking systems – NASA
Eyes on the Sky– Xavier University
Tom Van Flandern and Victor Slabinski – American Institute of Physics
Citizen Science, Old-School Style: The True Tale of Operation Moonwatch – Universe Today