Related Experiment Video
Updated: Aug 2, 2025

Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging
Published on: September 8, 2017
A magnified compact galaxy at redshift 9.51 with strong nebular emission lines
Hayley Williams1, Patrick L Kelly1, Wenlei Chen1
1Minnesota Institute for Astrophysics, University of Minnesota, Minneapolis, MN 55455, USA.
Abstract:
Ultraviolet light from early galaxies is thought to have ionized gas in the intergalactic medium. However, there are few observational constraints on this epoch because of the faintness of those galaxies and the redshift of their optical light into the infrared. We report the observation, in JWST imaging, of a distant galaxy that is magnified by gravitational lensing. JWST spectroscopy of the galaxy, at rest-frame optical wavelengths, detects strong nebular emission lines that are attributable to oxygen and hydrogen. The measured redshift is z = 9.51 ± 0.01, corresponding to 510 million years after the Big Bang. The galaxy has a radius of [Formula: see text] parsecs, which is substantially more compact than galaxies with equivalent luminosity at z ~ 6 to 8, leading to a high star formation rate surface density.
Related Concept Videos
Emission Spectra
Atomic Emission Spectroscopy: Lab
Atomic Emission Spectroscopy: Overview
Atomic Emission Spectroscopy: Instrumentation
Detection of Black Holes
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Interaction of EM Radiation with Matter: Spectroscopy

