Picture This

A lot of galaxies need guarding in this Hubble view

8 May 2017 Astronomy Now

Like the quirky characters in the upcoming film Guardians of the Galaxy Vol. 2, NASA’s Hubble Space Telescope has some amazing superpowers, specifically when it comes to observing galaxies across time and space. One stunning example is galaxy cluster Abell 370, which contains a vast assortment of several hundred galaxies tied together by the mutual pull of gravity.

News

Is dark matter “fuzzy”?

2 May 2017 Astronomy Now

Astronomers have used data from NASA’s Chandra X-ray Observatory to study the properties of dark matter, the mysterious, invisible substance that makes up a majority of matter in the universe. The study, which involves 13 galaxy clusters, explores the possibility that dark matter may be more “fuzzy” than “cold,” perhaps even adding to the complexity surrounding this cosmic conundrum.

Picture This

Discovering the X-ray treasures in Chandra’s archives

16 October 2016 Astronomy Now

Each year, NASA’s Chandra X-ray Observatory helps celebrate American Archive Month by releasing a collection of images using X-ray data. Each of these six new images — representing just a small fraction of the treasures that reside in Chandra’s unique archive — also includes data from telescopes covering other parts of the electromagnetic spectrum, such as visible and infrared light.

News

A young mammoth cluster of galaxies sighted in the early universe

25 May 2016 Astronomy Now

Astronomers have uncovered evidence for a vast collection of young galaxies 12 billion light years away. The newly discovered “proto-cluster” of galaxies, observed when the universe was only 1.7 billion years old (12 percent of its present age), is one of the most massive structures known at that distance.

Picture This

Hubble’s vibrant view of a massive galactic gathering

23 May 2016 Astronomy Now

This incredible image from the NASA/ESA Hubble Space Telescope reveals thousands of colourful galaxies in the constellation of Leo, components of cluster known as MACS J1149.5+2223. This vibrant view of the early universe was captured as part of the Frontier Fields campaign, which aims to investigate galaxy clusters in more detail than ever before.

Picture This

A cosmic kaleidoscope seen through multi-spectral eyes

21 March 2016 Astronomy Now

At first glance, this cosmic kaleidoscope of purple, blue and pink offers a strikingly beautiful — and serene — snapshot of the cosmos. However, this multi-coloured haze actually marks the site of two colliding galaxy clusters, forming a single object known as MACS J0416.1-2403 (or MACS J0416 for short), 4.3 billion light-years away from Earth.

Picture This

Disco lights from a galaxy cluster seen with multi-spectral eyes

14 March 2016 Astronomy Now

MACS J0717, some 5.4 billion light-years away from Earth in the constellation of Auriga (The Charioteer), is the result of four galaxy clusters colliding. This image is a combination of observations in visible light, X-rays and radio waves from the NASA/ESA Hubble Space Telescope, NASA’s Chandra X-ray Observatory, and the NRAO Jansky Very Large Array.

News

Telescopes combine to push frontier on galaxy clusters

12 March 2016 Astronomy Now

Galaxy clusters are enormous collections of hundreds or even thousands of galaxies and vast reservoirs of hot gas embedded in massive clouds of dark matter. To learn more about clusters, including how they grow via collisions, astronomers have used some of the world’s most powerful X-ray, optical and radio telescopes. The name for this galaxy cluster project is the “Frontier Fields”.

News

ASTRO-H satellite poised to enhance views of X-ray sky

7 February 2016 Astronomy Now

A new science satellite, the ASTRO-H X-ray Observatory, will blast into Earth orbit this month. The project, led by the Japan Aerospace Exploration Agency (JAXA), aims to collect a wealth of new data on everything from the formation of galaxy clusters to the warping of space and time around black holes. ASTRO-H boasts a sensitivity level that is orders of magnitude better than previous technology.