Tag: comets
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Complete Guide To Seeing Comet Lemmon This Week Close To Big Dipper
What Is Comet Lemmon and Why It’s Newsworthy Comet Lemmon, officially designated C/2025 A6 (Lemmon) and also known as comet A6, is a long‑period visitor from the outer edges of the solar system. First discovered on Jan. 3, 2025 by the Mount Lemmon Survey near Tucson, Arizona, this icy wanderer is making a rare, once‑in‑1,350‑year…
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Two Green Comets Lemmon and SWAN: How to See Them This Week
Overview: Twin Green Comets Gracing the Evening Sky Two emerald-hued comets are gracing the evening sky in mid-October 2025, offering skywatchers a rare chance to spot them with binoculars. Comet Lemmon (C/2025 A6) is shifting from morning to evening visibility, while Comet SWAN (C/2025 R2) remains a binocular-friendly target low in the southwestern sky. Both…
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Monday’s Comet Tracker: How To See Two Green Comets Near Bright Stars
Two Green Comets Tap the Night Sky: Lemmon and SWAN As the sky darkens this week, two green comets are making their well-timed return to observers with binoculars. Comet Lemmon (C/2025 A6) and Comet SWAN (C/2025 R2) have shifted from morning-only sightings to more convenient evening viewing, offering a rare chance to watch two active…
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This Week in Science: Tracing an Interstellar Comet, a Deep-Earth Gravity Anomaly, and AI-Designed Viruses
Interstellar Clues: Tracing the Origins of Comet 3I/ATLAS This week’s astronomy headlines center on the interstellar visitor 3I/ATLAS, the first known comet from beyond our solar system. Discovered in late June, 3I/ATLAS has since become a prime focus for scientists seeking to understand its age, trajectory, and birthplace within the galaxy. The latest analyses suggest…
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Two Green Comets Night-Sky Spectacle: Lemmon and SWAN Illuminating Autumn Skies
Two Green Comets Grace the Autumn Sky Two rare emerald visitors are sweeping through the inner solar system this fall, offering skywatchers in the Northern Hemisphere a unique chance to observe two comets in the same month. C/2025 A6 (Lemmon) and C/2025 R2 (SWAN) are making their paths around the sun, delivering visible tails and…
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Two Emerald Comets Light Up the Night Sky This October
Two Greenish Comets Captivate Night Skies This October This October brings a rare celestial treat: two greenish comets streaking across the night sky. C/2025 A6 (Lemmon) and C/2025 R2 (SWAN) are gracing the inner solar system and are visible from the Northern Hemisphere through the end of the month. For amateur stargazers, this is a…
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Two Greenish Comets Swing Through the Night Sky This Fall
Two Green Comets Make a Rare October Appearance This month brings a rare celestial treat: two greenish comets are streaking across the night sky, offering skywatchers in the Northern Hemisphere a unique chance to observe them through fall. The comets, officially named C/2025 A6 (Lemmon) and C/2025 R2 (SWAN), are traversing the inner solar system…
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Polarization of Interstellar Comet 3I/ATLAS vs Solar System Comets: A Comparative Analysis
Introduction Polarimetric measurements are a powerful tool for diagnosing the microphysics of dust in cometary comae. Recent work by Z. Gray and colleagues reports extended polarimetric data for the interstellar comet 3I/ATLAS, offering a rare window into the dust composition and scattering behavior of an object that traverses interstellar space before entering the solar system.…
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Polarization Comparison: 3I/ATLAS Interstellar Comet vs Distant Solar System Comets
Overview: Polarimetric insights into 3I/ATLAS Recent measurements of the interstellar comet 3I/ATLAS, reported by Z. Gray and colleagues, provide a unique window into the microphysics of dust in an extrasolar environment. By extending the polarimetric phase function over a broad range of phase angles, the study constrains the real part of the refractive index of…
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Polarization Parallels: Interstellar Comet 3I/ATLAS and Distant Solar System Comets
Overview Recent polarimetric measurements of the interstellar comet 3I/ATLAS, as reported by Z. Gray and colleagues, offer a surprising parallel with distant solar system comets. The analysis indicates that the microphysical properties of dust in the coma of 3I/ATLAS are not demonstrably different from those of far-flung comets within our own solar system. This finding…