Large enough to retain an atmosphere and drive geologic/hydrologic cycles, but not so massive that relocation is infeasible. This figure illustrates why planet size and escape velocity are critical factors
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Interstellar object 3I/ATLAS imaged by the Hubble Space Telescope. Could similar objects be the seeds of new planets around young stars? Image credit: NASA/ESA/David Jewitt (UCLA). Image Processing: Joseph DePasquale
This article was originally published at The Conversation. The publication contributed the article to Space.com’s Expert Voices: Op-Ed & Insights. Finding life beyond the Earth would be a major scientific
Habitable Zones Status Report astro-ph.CO September 15, 2025 Best value of the minimum probability for each cosmology scenario-habitability condition pair mentioned in the text. For each element in this
WASHINGTON — York Space Systems’ recent delivery of 21 satellites for the U.S. military marks the company’s largest batch to date, a milestone its chief executive says reflects years of
TAMPA, Fla. — Swissto12 has completed the Preliminary Design Review for its first direct-to-device connectivity satellite, the Swiss small geostationary spacecraft manufacturer announced Sept. 15. The company announced a contract
The companion light curve in two continuum bands interpreted with a pulsar direct heating model. (a) The models are shown by the curves and the data are shown by the
Amplification of the successor function under varying initial conditions. For each pixel in the heatmap, 100 soups containing 5000 expressions are run for 106 collisions. We measure the number of
PARIS — Launch companies are reiterating plans to sharply increase flight rates to meet growing government and commercial demand, even as some fall short of earlier projections. Executives speaking at
Reduced flux maps of HD 143811 AB obtained by Gemini/GPI in 2016 and 2019 (left and center) and Keck/NIRC2 in 2022 (right). These images are 2” × 2”. North is
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