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Index/Organizations/Vera C. Rubin Observatory

Vera C. Rubin Observatory

Astronomical observatory in Chile

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Jan 14, 2026
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What observational signatures would a bubble‑collision in the CMB produce and have any been reliably seen?

Bubble collisions in eternal‑inflation scenarios would leave large, azimuthally symmetric imprints in the cosmic microwave background (CMB) — roughly disk‑shaped temperature and polarization modulatio...

Jan 18, 2026

What is the astronomical community's consensus on interstellar objects like 3I/ATLAS?

The astronomical community’s prevailing judgment is that 3I/ATLAS is a natural interstellar comet — a view supported by multiple observatories, telescope imagery, and months of follow-up analysis — ev...

Nov 22, 2025

What are the reported sizes of 3I/Atlas objects in 2023–2025 observations?

Reported size estimates for interstellar comet 3I/ATLAS during 2023–2025 vary widely: Hubble-based papers and major press summaries place the nucleus diameter between roughly 320 meters and 5.6 kilome...