Spotting merging galaxies

Over 30 years ago, the Infrared Astronomy Satellite discovered that the universe contained many extremely luminous galaxies, some more than a thousand times brighter than our own Milky Way, but which are practically invisible ...

Image: SOHO's equinox sun

Last Wednesday, all locations on our planet enjoyed roughly the same number of hours of day and night. This event, called an equinox, takes place twice a year – around 20 March and then again around 23 September.

Hubble goes deep

This image from the Hubble Deep UV (HDUV) Legacy Survey encompasses 12,000 star-forming galaxies in a part of the constellation Fornax known as the GOODS-South field. With the addition of ultraviolet light imagery, astronomers ...

Image: The sun—two wavelengths, two different images

NASA's Solar Dynamics Observatory views our sun in 10 different wavelengths because each wavelength reveals different solar features. This Sept. 21, 2018, view of the sun uses two selected images taken at virtually the same ...

NASA to launch FORTIS to study extra-galactic dust

This month, the NASA-funded FORTIS sounding rocket—short for Far-ultraviolet Off Rowland-circle Telescope for Imaging and Spectroscopy—will launch from the White Sands Missile Range in New Mexico to investigate the properties ...

A new technique to gauge the distant universe

Scientists have developed a technique to use quasars – powerful sources driven by supermassive black holes at the centre of galaxies – to study the universe's history and composition. To demonstrate the new method, based ...

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