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news Astronomy Evidence status: Peer reviewed · Telescope spectroscopy
Webb measured a methane D/H ratio of 3.18% in interstellar comet 3I/ATLAS, 13 times comet 67P. What it says about a cold birthplace, and what it cannot.
news Astronomy Evidence status: Peer reviewed · Single event
A 1.7-second gamma-ray flash and a 51-second burst, 4 minutes apart from one spot, test as merger and collapsar types. What GRB 160425A shows, and its limits.
news Astronomy Evidence status: Peer reviewed · Observational study
Keck spectra show two faint star-forming galaxies near a near-pristine gas cloud from 2 billion years after the Big Bang. The link is inferred, not proven.
explainer Astronomy
How hot is the Sun? The surface is 5,772 K (5,499 °C, 9,930 °F), the core about 15.7 million K and the corona 1 to 2 million K. See how…
news Astronomy Evidence status: Peer reviewed · Calculated colours from existing spectra and models
Nearby white dwarfs look white on average, Warwick astronomers calculate, but about 1 in 30 would look yellow or pink, and one known star would look green.
explainer Astronomy
How many moons does Venus have? None, and Mercury has none either. See NASA's moon counts for every planet and why the Sun and tides leave both moonless.
explainer Astronomy
How long does it take to get to each planet? From 94 days to Venus to 12 years for Neptune: real NASA and ESA mission times, Hohmann math and gravity…
news Astronomy Evidence status: Peer reviewed · Observational study of one planet
JWST mapped hot Jupiter WASP-17b's atmosphere angle by angle: the evening edge is about 650 K hotter and puffier than the morning edge. How, and the catch.
explainer Astronomy
How long does it take to get to Mars? About 7 to 10 months. See NASA mission travel times, the Hohmann transfer math, launch windows and crewed trip estimates.
