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Is K2-18b Covered in Oceans of Water or Oceans of Lava?

Do Hycean worlds even exist? If they do, we're not sure because a lava world could produce the same atmospheric signals.

United kingdomOliver shorttleR crawford stscDavida aguilarJ olmsted stscN madhusudhan cambridge university spectraN madhusudhan cambridge universityInstitute of astronomy at cambridge universityKepler space telescopeNear infrared imagerSlitless spectrographNear infrared spectrographCambridge universityImage credit

Pulsars, not dark matter, explain our galaxy s antimatter

An enormous amount of antimatter is coming from our galactic center. But the culprit probably isn't dark matter, but merely neutron stars.

Davida aguilarFiorenza donatoDmitri pogosyan university of albertaSolar systemAlpha magnetic spectrometerInternational space stationSpace shuttle endeavorLarge hadron colliderLarge area telescopeMilky way

Forget Alien Megastructures New Study Says We Need to Look For Service Worlds

In 1960, Freeman Dyson proposed how advanced civilizations could create megastructures that enclosed their system, allowing them to harness all of their star's energy and multiplying the habitable space they could occupy.

Philip lubinRaghav narasimhaDavida aguilarJohn desmond bernalChandra sivaramRussel walkerOlaf stapledonNikolai kardashevTim pyleCarl saganSanta barbaraMargarita safonovaFreeman dysonIndian institute of astrophysicsDepartment of scienceChrist university

Why Build Megastructures? Just Move Planets Around to Make Habitable Worlds

Why Build Megastructures? Just Move Planets Around to Make Habitable Worlds
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John desmond bernalNikolai kardashevChandra sivaramTim pyleRussel walkerDavida aguilarSanta barbaraOlaf stapledonPhilip lubinMargarita safonovaCarl saganFreeman dysonRaghav narasimhaService worldsChrist universityExperimental cosmology group

Are the missing baryons simply too hot to see?

There are two types of missing, or "dark" matter: baryonic (made of normal matter) and non-baryonic. Have we finally found the normal stuff?

United statesJoseph depasquale stscTom abelIrvinet fangGlrx wikimedia commonsTsaghkyan wikimedia commonsKailash sahu stscDavida aguilarStanfordi zhuravlevaRalf kaehlerIllustris collaboraitonMax planck institute for astrophysicsNational accelerator laboratoryExtreme deep fieldOliver hahnMilky way