Free Astronomy - July/August 2019
Название: Free Astronomy - July/August 2019
Размер: 18 МВ
Год издания: 2019
50 years ago, we walked on the Moon (Part Two of Two)
Let us continue and complete our contribution to the celebrations of the fiftieth anniversary of the
conquest of the Moon, the first part of which was published in the May-June issue. The goal remains
to highlight the reasons why NASA chose specific sites for the six human landings and the importance...
Heavy metal planet fragment survives destruction from dead star
A fragment of a planet that has survived the death of its star has been discovered in a disc of debris
formed from destroyed planets which the star ultimately consumes. The discovery was made by a group
of astronomers led by the University of Warwick and involving research staff from the IAC and ULL...
Hubble captures rare active asteroid
Thanks to an impressive collaboration bringing together data from ground-based telescopes, all-sky surveys
and space-based facilities — including the Hubble Space Telescope — a rare self-destructing asteroid
called 6478 Gault has been observed. Clear images from the NASA/ESA Hubble Space Telescope have...
Pinpointing Gaia to map the Milky Way
Gaia, operated by the European Space Agency (ESA), surveys the sky from orbit to create the largest,
most precise, three-dimensional map of our Galaxy. One year ago, the Gaia mission produced its muchawaited
second data release, which included high-precision measurements — positions, distance and...
A system of globular clusters in the disc of a galaxy
Globular clusters are clusters of between a hundred thousand and a million stars, whose components
have all roughly the same age, and have similar chemical composition. They are very old objects,
formed some 11,500 million years ago, 2,300 million years after the Big Bang. These clusters are...
Radio emissions from dust particles in MACS0416_Y1
Researchers have detected a radio signal from abundant interstellar dust in MACS0416_Y1, a galaxy
13.2 billion light-years away in the constellation Eridanus. Standard models can’t explain this much dust
in a galaxy this young, forcing us to rethink the history of star formation. Researchers now think...
HiPERCAM reveals new details about the oldest stars in the Milky Way
An international team, led by a researcher from the Universitat Politècnica de Catalunya - BarcelonaTech
(UPC) and the Institute of Space Studies of Catalonia (IEEC), has measured for the first time the stellar
parameters of a very old kind of stars, known as cool subdwarf stars, in our Galaxy, the Milky Way...
Hubble assembles wide view of the distant Universe
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. The deep-sky
mosaic, created from nearly 7,500 individual exposures, provides a wide portrait of the distant Universe...
GRAVITY breaks new ground in exoplanet imaging
The GRAVITY instrument on ESO’s Very Large Telescope Interferometer (VLTI) has made the first direct
observation of an exoplanet using optical interferometry. This method revealed a complex exoplanetary
atmosphere with clouds of iron and silicates swirling in a planet-wide storm. The technique presents...
Disparity in Hubble Constant calculations is not a fluke
Astronomers using NASA’s Hubble Space Telescope say they have crossed an important threshold in revealing
a discrepancy between the two key techniques for measuring the universe’s expansion rate. The
recent study strengthens the case that new theories may be needed to explain the forces that have...
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