activity
20062026
most citedHabitable Zones Around Main-Sequence Stars: New Estimates

1.6k citations · 9.4k across the 131 of their papers we have counts for

collaborators

133 papers

physics.pop-ph2026

Six objects reported at 480 mph in a declassified military infrared video show brightness flicker at bird wingbeat rates

Jacob Haqq-Misra, Ravi Kopparapu, Richard Cloete +3

In September 2026 the U.S. Department of War released an infrared video recorded from a military aircraft over the Middle East, with a mission report describing six small spherical…

physics.pop-ph2026

Limits on Kinematic Inference from the PURSUE Airborne Sensor Videos

Jacob Haqq-Misra, Ravi Kopparapu

This paper analyzes the 112 sensor videos released under the PURSUE (Presidential Unsealing and Reporting System for UAP Encounters) initiative. Redactions to on-screen displays li…

astro-ph.EP2026

The First Remotely Detected Biosignature May Not Be the Most Common: Implications for JWST and HWO

Ravi Kopparapu

The first detected member of a new astronomical class is often not representative of the underlying population, but instead reflects the selection effects of the observing techniqu…

astro-ph.EP2026★ 1 cited

Atmospheric Escape Rates from Mars - If it Orbited an Old M-Dwarf Star

David A. Brain, Ofer Cohen, Thomas E. Cravens +35

Atmospheric escape is an important process that influences the evolution of planetary atmospheres. A variety of physical mechanisms can contribute to escape from an atmosphere, inc…

astro-ph.IM2026

Habitable Worlds Observatory (HWO): Living Worlds Community Working Group: The Search for Life on Potentially Habitable Exoplanets

Giada Arney, Niki Parenteau, Natalie Hinkel +25

The discovery of a biosphere on another planet would transform how we view ourselves, and our planet Earth, in relation to the rest of the cosmos. We now know Earth is one planet a…

astro-ph.IM2026★ 1 cited

NASA Decadal Astrobiology Research and Exploration Strategy (NASA-DARES 2025) White Paper -- Habitable Worlds Observatory Living Worlds Science Cases: Research Gaps and Needs

Niki Parenteau, Giada Arney, Eleanora Alei +28

Executive Summary: The Habitable Worlds Observatory (HWO) is the first astrophysics flagship mission with a key cross-divisional astrobiology science goal of searching for signs of…