Ilimin taurari
A kimiyya muna matuƙar buƙatar ƙirƙira ta tunani. Kimiyya ba lissafi ko dabaru kaɗai ba ce; tana kuma ɗauke da kyau da waƙa.
— (1871)
Wani brown dwarf yana kamar yana karkarwa duk bayan kwanaki 171. Wata ɓoyayyiyar duniya na iya jan shi, amma bayanan har yanzu suna ba da damar tsarin biyu
High-quality spectra 23 sun nuna periodic shift mai ƙarfi a motion na CD-35 2722 B. Model da ya fi dacewa da bayanan shi ne eccentric companion guda da minimum mass kusa da na Jupiter, amma model mai objects biyu zai iya kwaikwayon signal ɗin, slow brown-dwarf variability har yanzu ba za a iya cire shi gaba ɗaya a principle ba, kuma kalmar ‘exomoon’ ba ta da settled boundary a wannan yanayin.
Aunawar isotope ta farko daga tauraron wutsiya na tsakanin taurari na nuna cewa wataƙila ya samu a kusa da tsohon tauraro mai ƙarancin ƙarafa — amma da babban rashin tabbas
Masana taurari sun yi amfani da VLT wajen auna rabon isotopes na carbon da nitrogen a 3I/ATLAS, tauraron wutsiya na uku da aka sani daga tsakanin taurari — karo na farko da aka iya yin haka ga wani abu daga wani tauraro. Duk rabon biyu sun fi na taurarin wutsiyar tsarin Rana girma, abin da ya dace da yiwuwar 3I ya samu a yankin waje mai sanyi na faifan da ke kewaye da tsohon tauraro mai ƙarancin metalllicity. Aunawar ta gaske ce kuma ita ce ta farko, amma ta dogara da abu guda, rabon biyu daga molecule guda da babban rashin tabbas — ba gano inda 3I ya fito ba ne, kuma ba shi da alaƙa da rayuwa.
Euclid ya fi ninka ƙaramin sample na quasars daga beyond redshift 7
A first year and a half na Euclid Wide Survey, search over roughly 3000 square degrees ya samu new quasars 31 tsakanin redshift 6.6 da 7.8. Goma sha biyu suna redshift 7 ko higher, more than doubling handful da aka sani kafin Euclid, kuma ɗaya a redshift 7.77 yanzu most distant quasar on record ne. Real advance ba single record ba ne, wanda kawai ya nudge frontier da ya zauna near redshift 7.5 shekaru: survey power ne na find rare, mostly faint objects in bulk, abin da ya sa suke useful as probes na young Universe. Initial result ne, full statistical analysis da much spectroscopic confirmation har yanzu suna zuwa.
Sukari na farko da aka samu tsakanin taurari sinadari ne, ba rayuwa ba
Masana taurari sun ruwaito gano kwayar sukari ta gaske ta farko a sararin tsakanin taurari: erythrulose, ketose mai chirality da carbon huɗu, wanda aka gani a bakan rediyo daga gajimaren Cibiyar Galaxy G+0.693−0.027. Ganowar tana da ƙarfi ta fuskar fasaha—layukan bakan da yawa, daidaita yawa da hanyar samuwa mai yiwuwa a kan ƙwayoyin kankara daga ƙananan kwayoyi. Tana da muhimmanci domin tana nuna wani rukuni na sinadaran kafin rayuwa a wajen Duniya da cikin sarari. Amma ba ribose ba ne, ba RNA ba ne, ba rayuwa ba ce, kuma ba hujjar cewa Duniyar farko ta sami isasshen sukari daga sarari domin fara rayuwa ba ce.
K2-18 b: tazarar da ke tsakanin alama da babban kanun labari
A Afrilu 2025, observations na JWST na sub-Neptune K2-18 b an yada su a matsayin mafi ƙarfi daga cikin signs of life bayan solar system. Takardar kanta ta fi taka-tsantsan: kusan 3σ hint — ƙasa da threshold na firm detection — cewa ɗaya daga sulfur molecules biyu masu kama, possible biosignatures, yana nan, a planet da “habitable ocean” nature ɗinta ma ba a tabbatar ba. Marubutan sun nuna non-biological sources kuma suna neman ƙarin data; independent teams tun daga nan sun sami evidence ɗin ya fi rauni. Measurement ne na gaske, ba gano rayuwa ba.
DESI ta gina ma’aunin cosmic mafi kaifi — da wani “maybe” mai taka-tsantsan game da dark energy
DESI ta auna expansion history na universe da baryon-acoustic ruler mafi precise har yanzu, daga objects miliyan shida. Ita kaɗai tana agree da standard model inda dark energy constant ce. Sai idan aka haɗa DESI da CMB da supernova sample ne preference ga evolving dark energy ke bayyana — 2.6σ zuwa 3.9σ bisa wane supernovae aka ƙara, ƙasa da discovery threshold kuma sensitive ga paired data. Tambaya ta gaske da aka sa ta precise, ba amsa ba.
JWST ta ga unidentified fingerprint iri ɗaya a Titan da Pluto
JWST spectra suna nuna real absorption feature kusa da 5.11 micrometers a surfaces na Titan da Pluto. Signal ɗin yana bayyana a independent instruments, behaviour ɗinsa ya fi dacewa da surface feature fiye da atmospheric haze, kuma bai match da published laboratory spectra na expected ices ba. Wannan unresolved identification problem ne, ba evidence na exotic substance ba: likely answer ordinary frozen organic compound ne wanda laboratory fingerprint ɗinsa ba a auna a right conditions ba tukuna.
Galaxy mafi nisa da aka kama tana barin ionizing light ɗinta ya tsere
Masana taurari sun yi amfani da JWST da Hubble don kama ionizing ultraviolet da ke tserewa daga galaxy guda kusan shekaru miliyan 250 bayan cosmic reionization — leakage mafi nisa da aka taɓa gani kai tsaye. Escape fraction na 50–100% da zai iya zama headline yana da asali amma reconstruction ne ta models, ba measurement kai tsaye ba; sakamakon da ya fi shiru shi ne gwajin high-redshift na farko na yadda za a gano leakage ɗin lokacin da ba za a iya ganinsa kai tsaye ba.
Tauraro mai wutsiya 3I/ATLAS daga wani tauraro yana ɗauke da ruwan da ya samu a sanyi fiye da namu — karatun sinadarai na farko daga wani tsarin duniyoyi
Ta amfani da ALMA, masana taurari sun ƙayyade rabon hydrogen “mai nauyi” da na yau da kullum a ruwan 3I/ATLAS — abu na uku da aka sani daga tsakanin taurari — suka gano deuterium mai yawa: aƙalla kusan sau 40 na tekunan Duniya da sau 30 na tauraro mai wutsiya na Tsarin Rana. Wannan yana nuna ruwa da ya samu a yanayi mafi sanyi fiye da namu. Sakamakon iyaka ta ƙasa ce da aka samo a kaikaice (ba a gano ruwan kai tsaye ba), kuma bai ce kome game da rai ko fasaha ba — sinadarai da sanyi kawai.
Bugun rediyo biyu na ban mamaki a saman Antarctica har yanzu ba a bayyana su ba — kuma bayanin “sabon barbashi” yana rasa goyon baya
Bugun rediyo biyu da wani gwajin balon Antarctica ya rubuta shekaru da suka wuce har yanzu ba su da bayanin da aka amince da shi; wani bincike na musamman na Pierre Auger bai ga alamar ruwan barbashin da ya kamata su haifar ba, yana rage yiwuwar fassarar “sabon barbashi” sosai yayin da matsalar kanta ba ta warware ba.