On 25 July, an asteroid the size of a football field flew by Earth, coming within 65 000 km of our planet's surface during its closest approach—about one fifth of the distance to the Moon.
Space Exploration
Aug 5, 2019
0
241
Believe it or not, this long, luminous streak, speckled with bright blisters and pockets of material, is a spiral galaxy like our Milky Way. But how could that be?
Astronomy
Aug 2, 2019
1
630
A 100-metre-wide asteroid passed just 70,000km from Earth on Thursday, Australian time. It was discovered by the Brazilian SONEAR survey just days ago, and its presence was announced mere hours before it zoomed past our planet. ...
Space Exploration
Jul 25, 2019
2
316
Regions of the Universe containing very few or no galaxies—known as voids—can help measure cosmic expansion with much greater precision than before, according to new research.
Astronomy
Jul 10, 2019
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347
It took three sky surveys—conducted at telescopes in two continents, covering one-third of the visible sky, and requiring almost 1,000 observing nights—to prepare for a new project that will create the largest 3-D map ...
Astronomy
Jul 9, 2019
1
0
Galaxy clusters are some of the most massive structures in the cosmos, but despite being millions of lightyears across, they can still be hard to spot. Researchers at Lancaster University have turned to artificial intelligence ...
Astronomy
Jul 3, 2019
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0
Astronomers have put together the largest and most comprehensive "history book" of galaxies into one single image, using 16 years' worth of observations from NASA's Hubble Space Telescope.
Astronomy
May 16, 2019
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396
In the 1930s, it was first noticed that the dynamics of astrophysical objects (galaxies, galaxy clusters and the universe itself) required an invisible and unknown form of mass, known now as dark matter. Strong mass discrepancies ...
Astronomy
May 16, 2019
1
121
The discarded 'upper stage' from a rocket launched almost ten years ago has recently crumbled to pieces.
Space Exploration
Apr 12, 2019
0
39
Astronomers have carried out an observational campaign to study the extreme variability of the active galactic nucleus (AGN) SDSS J2232−0806, nicknamed the Big Dipper. Results of these observations, described in a paper ...
