Nature Hub

     From :- W.M. KECK Observatory       By :-  :   Meagan O’Shea      Editted by :- Amal Udawatta Artist interpretation depicts a hypothesized event known as a superkilonova. Initially, a massive star explodes in a supernova, which generates elements like carbon and iron (left). In the aftermath, two neutron stars are born, at least one of which is believed to be less massive than our Sun (middle). The neutron stars spiral together, sending gravitational waves rippling through the cosmos, before merging in a dramatic kilonova (right). Kilonovae seed the universe with the heaviest elements, such as gold at platinum, which glow in red light as depicted in the animation. Credit: Caltech/K. Miller and R. Hurt (IPAC)  A team of astronomers using a variety of telescopes, including the W. M. Keck Observatory on Maunakea, Hawaiʻi Island, have discovered a possible “Superkilonova” that exploded not once but twice, evidence that this o...

  From:- Space.com     By  Julian Dossett   Edited by: Amal Udawatta A photo from the Subaru Telescope in Hawaii.   (Image credit: T. Currie/Subaru Telescope, UTSA) While our ability to view distant worlds with advanced telescopes has come a long way in a short time, we can still only photograph a tiny fraction of the planets throughout our cosmos with the technology we have today. However, astronomers in Hawaii just spotted a pair of exciting discoveries — a huge exoplanet and a brown dwarf — using Japan’s  Subaru Telescope , which sits atop Mauna Kea, a dormant volcano on the Big Island of Hawaii. These new celestial discoveries represent the first findings from OASIS (Observing Accelerators with SCExAO Imaging Survey), a program that relies on the Subaru Telescope, as well as data from other sources. The  exoplanet  that the astronomers found is called HIP 54515 b. It's 271 light-years away from Earth and orbits a star in the Leo cons...

   From - Space,com ,    By   Stefanie Waldek     Edited by  Amal Udawatta An artist's representation of WASP-18b, an exoplanet some 400 light-years from Earth.   (Image credit: NASA/JPL-Caltech (K. Miller/IPAC)) Astronomers have produced the first-ever three-dimensional map of a planet outside our  solar system  — WASP-18b — marking a major leap forward in exoplanet research. Using the  James Webb Space Telescope , researchers applied a new technique called 3D eclipse mapping, or spectroscopic eclipse mapping, to track subtle changes in various light wavelengths as WASP-18b moved behind its  star . These variations allowed scientists to reconstruct temperature across latitudes, longitudes and altitudes, revealing distinct temperature zones throughout the planet's atmosphere. "If you build a map at a wavelength that water absorbs, you'll see the water deck in the atmosphere, whereas a wavelength that water does not ab...