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Why can t we measure how fast the universe is expanding?

Usually new tech brings us closer to understanding more of the universe, but in the field of cosmology, one uncertainty is only getting worse.

Jamie bockRichard andersonJames webbStefan ballmerHubble heritage team stscEuropean space agency planckA goobar stockholm universitySyracuse universitySwiss federal institute of technology lausanneJames webb space telescopeHubble spaceHubble space telescopeStockholm universityHubble heritage teamCosmic microwave backgroundBig bang

This peculiar galaxy has two supermassive black holes

A recent image taken by the Gemini South observatory shows the chaotic result of a merger between two spiral galaxies one billion years ago.

M rodriguez international gemini observatory nsf noirlabInternational gemini observatory noirlabJ miller international gemini observatory nsf noirlabInternational gemini observatoryGemini southInternational geminiGemini observatoryNational science foundationSupermassive black holesAstronomical objectsBlack holeCelestial mechanicsConcepts in astronomyExtragalactic astronomyOuter spacePhysical cosmology

New James Webb data shows the crisis in cosmology persists

In the last few decades, one big question has created a crisis in the field of cosmology: How fast is the universe expanding?

Adamg riessAlyssa pagan stscBig bangJames webb space telescopeHubble space telescopeNear infrared cameraWide field cameraImage processingAlyssa paganAstronomical objectsConcepts in astronomyCosmic distance ladderCosmic microwave backgroundHubble 039s lawPhysical cosmologyPhysical sciences

Spiral galaxy about to eat its dwarf galaxy neighbor

An image from the Dark Energy Camera shows an act of galactic cannibalism, with a spiral galaxy devouring a nearby dwarf galaxy that wandered into its path.

Milky wayMagallanesy antáica chilenaUnited statesNational science foundationDark energy cameraUs department of energyCerro tololo inter american observatoryAstronomical objectsBlack holeCelestial mechanicsConcepts in astronomyDwarf galaxyExtragalactic astronomyPhysical cosmologyPhysical sciencesSpace science

DESI surveyed 2 million objects to understand dark energy

An early release of data from the Dark Energy Spectroscopic Instrument contains nearly 2 million astronomical objects.

United statesKitt peak national observatoryLaurie stepheyAnthony kreminNicholasu mayallNational science foundation noirlabBerkeley labTelescope at kitt peak national observatoryDark energy spectroscopic instrumentNational science foundationConcepts in astronomyNatural sciencesObservational astronomyPhysical cosmologyPhysical sciencesScientific method

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