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Proposal Deadline was extended

The proposal submission deadline for the Arecibo Observatory 2021 Semester A observations has been extended by one week. The deadline is now September 10, 2020 (17:00 AST, 21:00 UTC).

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One of the auxiliary cables that helps support a metal platform in place above the Arecibo Observatory in Puerto Rico, broke on Monday (Aug. 10) causing a 100-foot-long gash on the telescope’s reflector dish. Operations at the UCF-managed observatory are stopped until repairs can be made. + Read More

We are hiring

The University of Central Florida (UCF) and the Department of Planetary Radar Group at the Arecibo Observatory (AO) invites applications for the Research Intern position. The intern will participate in the research activities of the planetary radar group of the Arecibo Observatory. The details of the research projects will be tailored based on the level of background knowledge and skills of the successful applicant.  This is a paid (stipend) internship position for undergraduate students only (starting year 2 or more). + Read More


The AO management team would like to cordially invite you all to participate in the "Arecibo Observatory Virtual Town Hall'’ on July 29, 2020 from 2:00 PM - 3:30 PM EDT. The meeting will open with several status updates about the observatory, then a Q&A session with all the attendees. Read More


In the 2030’s, two spacecrafts - NASA’s Europa Clipper and the European Space Agency’s Jupiter Icy Moons Explorer (JUICE) missions - will enter orbit around Jupiter to study the planet’s largest moons. Until then, observations of the Galilean satellites - named for their discoverer - are restricted to observations from Earth. Read More


The Arecibo Observatory in Puerto Rico is following an asteroid approaching Earth this week and while it poses no threat, it appears to know our planet is facing a pandemic. “The small-scale topographic features such as hills and ridges on one end of asteroid 1998 OR2 are fascinating scientifically,” says Anne Virkki, head of Planetary Radar at the observatory. “But since we are all thinking about COVID-19 these features make it look like 1998 OR2 remembered to wear a mask.” The National Science Foundation facility, which is managed by the University of Central Florida, has a team of experts who monitors near-Earth asteroids. This asteroid is in a special class of near-Earth asteroids called Potentially Hazardous Objects (PHOs).

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The Karl G. Jansky Lectureship, first awarded in 1966, is given in recognition of outstanding contributions to the advancement of radio astronomy. Dr. Haynes started her work in radio astronomy as an intern at the Arecibo Observatory in the summer of 1973, and throughout her career she has used the telescope for her groundbreaking research on the nature and characteristics of the nearby galaxy populations while making significant contributions to the observatory, overseeing instrument upgrades and leading the Arecibo Legacy Fast ALFA survey. + Read More


Dr. Kristen Jones was a postdoctoral researcher at the Arecibo Observatory from September 2016 - August 2019, but her connection with AO started long before then. “I had been an REU student at the observatory 10 years before my postdoc,” Dr. Jones stated, referring to the National Science Foundation’s Research Experience for Undergraduates (REU) program. “Data from that project were the basis for a paper I published in 2018.” Read More

Space & Atmospheric

A unique, high-altitude plasma cavity formed over Arecibo during an ionospheric heating campaign conducted at the observatory in June of 2019. Simultaneously, the Arecibo Incoherent Scatter Radar (ISR) collected measurements of the narrow cavity, revealing an exceptionally deep depletion of the electron density and a strong enhancement of the electron and ion temperatures. Read More


New results from the AO Remote Optical Facility (ROF) have shown that certain wavelike perturbations in the Earth’s ionosphere are highly dependent on season in a variety of ways. For the first time, these perturbations – known as Medium Scale Traveling Ionospheric Disturbances (MSTIDs) - were conclusively shown to be modulated by the geomagnetic and solar activities.

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CAVEAT: The Arecibo Observatory is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.