European Space Agency
Every Cosmic Herald story on European Space Agency — missions, launches, discoveries, and the business of space, newest first.
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Astronomy
Webb Peers Into NGC 7129, a Dusty Stellar Nursery Full of Jets and Hidden Protostars
A new Webb image of NGC 7129, about 3,300 light-years away, cuts through the dust to show protostars, shocked gas, bow shocks and a 3.5-light-year cavity carved by the young 5-8 solar-mass star LkH-alpha 234.
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Astronomy
A 27-Year-Old Hubble Puzzle Points to a Planet Born From a Dying Star
Unexplained lines in 1999 Hubble spectra of white dwarf HS 0209+0832 turn out to be niobium and other heavy elements, evidence for what may be the first planet around a white dwarf that formed from its star's death rather than its birth.
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Astronomy
Hubble's Out-of-Sync Galaxy: NGC 4698 and the Bulge That Turned 90 Degrees
A new Hubble image of NGC 4698, a Virgo Cluster spiral about 55 million light-years away, shows a bulge jutting out at a right angle to its disc and a core rotating perpendicular to everything around it.
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Astronomy
Webb's 'Cosmic House of Mirrors' Catches a Rare Lensing Trick Twice in One Cluster
ESA/Webb's September Picture of the Month shows MACS J0454.1-0300, where cluster gravity warps and multiplies distant galaxies. The rare four-plus-image arrangement appears twice, a first, with clumps magnified more than 300 times.
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Astronomy
Hubble Spots a 210-Light-Year Superbubble Carved Into a Star Nursery in the Large Magellanic Cloud
A new Hubble image reveals a 210-by-140-light-year cavity blown into the N44 nebula by massive stars, with nearly 30,000 still-forming stars catalogued in the surrounding shell.
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Astronomy
How Astronomers Measure Cosmic Distances: The Distance Ladder
No single method measures the universe. Astronomers climb a ladder — parallax, then pulsing Cepheid stars, then exploding white dwarfs, then redshift — each rung calibrating the next, and a crack near the top is now cosmology's biggest open problem.
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Astronomy
Euclid Doubles the Known Sample of the Universe's Most Ancient Quasars
ESA's Euclid telescope has found 31 new quasars from the cosmic dawn, including two record-breakers at redshifts 7.77 and 7.69, more than doubling the known sample from that era.
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Astronomy
Gaia Data Just Killed the 'Universal' Stellar Initial Mass Function
A Gaia-based survey of 110 Milky Way star clusters finds the stellar initial mass function's 'break mass' shifts with cluster age, undermining decades of assuming one universal recipe for how stars of different sizes form.
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Astronomy
Euclid Space Telescope Uncovers the Universe's Most Ancient Quasars
ESA's Euclid mission has spotted 31 quasars from the universe's first billion years, including two record-holders shining with a trillion Suns' worth of light just 670 million years after the Big Bang.
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Astronomy
Euclid Space Telescope Uncovers 31 Ancient Quasars, Two From the Universe's First 5 Percent
ESA's Euclid telescope has spotted 31 quasars from the early universe, including two dating to just 670 million years after the Big Bang, deepening a puzzle over how supermassive black holes grew so fast.
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Astronomy
X-ray Echoes of Dead Stars Nudge the Milky Way's Outer Arms Farther Out
Using dust-scattered X-ray light echoes from three gamma-ray bursts, astronomers re-measured two of the Milky Way's outer spiral arms and found them up to 10% farther from the galactic center than assumed.
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Astronomy
Hubble's 'Chandelier Cluster' Reveals Its Ancient Stars Formed in Two Separate Bursts
Hubble's June 2026 image of NGC 6723, the 'Chandelier Cluster,' shows its 10-billion-year-old stars formed in two closely spaced bursts — the second within 634 million years of the first — undercutting the old idea that globular clusters are single-age populations.
