-
JWST Reveals Most Distant Parallax-Measured Y Dwarf in Deep Field
https://www.bioscience.com.pk/en/subject/astronomy/the-cold-substellar-frontier-in-jwst-extragalactic-surveys-a-robust-parallax-measurement-yields-the-most-distant-known-ultra-cold-y-dwarfA drifting substellar world located 200 light-years away provides a pristine atmospheric benchmark for isolated planetary-mass objects. An extremely cold, drifting world known as JADES-GS-BD-5, lurking deep in an extragalactic field observed by the...
-
Mysterious Gamma-Ray Burst Feature Tested Against Starlight Scatters
https://www.bioscience.com.pk/en/subject/astronomy/spectral-constraints-on-line-seed-inverse-compton-models-for-the-mev-feature-in-grb-221009aare viable energy-boosting targets, proving their actual presence during the prompt explosion remains difficult. Observed host galaxy emission lines and late-time X-ray afterglow features point to rich surrounding gas, but they do not automatically...
-
JWST Reveals Why Gas Giants Are In A Desperate Race Against Time To Form
https://www.bioscience.com.pk/en/subject/space-science/scientists-used-jwst-to-watch-72-young-star-systems-lose-the-gas-needed-to-build-giant-planetsNew JWST observations reveal the complex processes unfolding around young stars, shedding light on the limited timeline for giant planet formation. The formation of gas giants like Jupiter and Saturn is a high-stakes race against time, according to new...