James Webb Space Telescope

James Webb Space Telescope mirror, instruments mated with spacecraft

28 August 2019 Astronomy Now

James Webb Space Telescope’s mirrors and science instruments have been mechanically attached to the observatory’s sunshield and subsystems, a major milestone for engineers building the infrared telescope. Launch from French Guiana remains targeted for 2021.

Webb telescope’s launch delayed until 2020

28 March 2018 Stephen Clark

Blaming a slew of technical snags and “avoidable errors,” NASA officials said Tuesday that the launch of the James Webb Space Telescope, already years behind schedule, will be delayed to 2020, potentially pushing the mission’s development cost above an $8 billion cap mandated by Congress.

Jupiter’s moons, black holes, exoplanets among JWST’s first scientific targets

4 December 2017 Stephen Clark

The James Webb Space Telescope should start returning its first scientific results by the end of 2019, and scientists recently announced a slate of observations selected to whet the appetites of astronomers who will use the multibillion-dollar facility well into the 2020s.

James Webb Space Telescope shipped to Texas for its biggest test yet

9 May 2017 Stephen Clark

The centerpiece of the James Webb Space Telescope has arrived at NASA’s Johnson Space Center in Houston for a three-month test to ensure the observatory’s sensors and gold-coated mirrors work in the frigid temperatures of deep space.

NASA resumes JWST vibration testing

25 January 2017 Stephen Clark

Vibration testing on the James Webb Space Telescope, the multibillion-dollar successor to Hubble, has resumed after engineers traced a problem that cropped up last month to a restraint holding part of the observatory’s giant segmented mirror in place for launch.

Engineers examine unexpected readings from JWST shake test

20 December 2016 Stephen Clark

NASA says engineers are diagnosing the source of “anomalous readings” during a recent vibration test of the sensitive optics and sensors at the heart of NASA’s James Webb Space Telescope.

Large number of dwarf galaxies discovered in the early universe

25 November 2016 Astronomy Now

Researchers have found a large population of distant dwarf galaxies that could reveal important details about a productive period of star formation in the universe billions of years ago. It is believed that dwarf galaxies played a significant role during the so-called reionisation era in transforming the dark early universe into one that is bright, ionised and transparent.

Who stole all the stars?

11 October 2016 Astronomy Now

Investigating the millions of missing stars from the centres of two big galaxies, researchers say they may have solved this cosmic whodunit — and the main culprits are not the usual suspects. While the astronomers confirm that one of the depleted cores is the largest ever detected, they report that it may not have formed in the manner previously thought.

Using oxygen as a tracer of galactic evolution

7 October 2016 Astronomy Now

A new study comprised of 7,000 galaxies casts light on how young, hot stars ionise oxygen in the early universe and the effects on the evolution of galaxies through time. The study presents the first measurements of the changing strengths of oxygen emission lines from the present day and back to 12.5 billion years ago.

The Frontier Fields: where primordial galaxies lurk

29 September 2016 Astronomy Now

In the ongoing hunt for the universe’s earliest galaxies, NASA has wrapped up its observations for the Frontier Fields project. This ambitious venture has combined the power of all three of NASA’s orbital observatories — the Spitzer Space Telescope, the Hubble Space Telescope and the Chandra X-ray Observatory — to delve as far back in time and space as current technology can allow.