Guido Roberts-Borsani

Mar 6, 2024 | nature.com | Kristan Boyett |Michele Trenti |Nicha Leethochawalit |Benjamin Metha |Guido Roberts-Borsani |Paola Santini | +12 more

AbstractJames Webb Space Telescope observations have spectroscopically confirmed the existence of galaxies as early as 300 Myr after the Big Bang and with a higher number density than what was expected based on galaxy formation models and Hubble Space Telescope observations.

Jan 17, 2024 | nature.com | Nicolas Laporte |Yuxuan Yuan |William Baker |Anton Koekemoer |Daniel L Magee |William McClymont | +9 more

AbstractDuring the epoch of reionization, the first galaxies were enshrouded in pristine neutral gas, with one of the brightest emission lines in star-forming galaxies, Lyman α (Lyα), expected to remain undetected until the Universe became ionized. Providing an explanation for the surprising detection of Lyα in these early galaxies is a major challenge for extragalactic studies.

Sep 1, 2023 | dailymaverick.co.za | Guido Roberts-Borsani

THE CONVERSATION The universe used to be filled with a hydrogen fog, before early stars and galaxies burned through the haze. Astronomers are studying galaxies that tell them about this period in the early universe. The universe we live in is a transparent one, where light from stars and galaxies shines bright against a clear, dark backdrop.

Aug 13, 2023 | singularityhub.com | Guido Roberts-Borsani |Space science

The universe we live in is a transparent one, where light from stars and galaxies shines bright against a clear, dark backdrop. But this wasn’t always the case—in its early years, the universe was filled with a fog of hydrogen atoms that obscured light from the earliest stars and galaxies. The intense ultraviolet light from the first generations of stars and galaxies is thought to have burned through the hydrogen fog, transforming the universe into what we see today.

Aug 11, 2023 | thehansindia.com | Guido Roberts-Borsani

While previous generations of telescopes lacked the ability to study those early cosmic objects, astronomers are now using the James Webb Space Telescope’s superior technology to study the stars and galaxies that formed in the immediate aftermath of the Big BangThe universe we live in is a transparent one, where light from stars and galaxies shines bright against a clear, dark backdrop.