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Results 21 - 40 of 64.


Earth Sciences - Astronomy / Space - 22.04.2021
Cat chases mouse in space
Cat chases mouse in space
By Cornelia Kröpfl, BA MA If the groundwater rises sharply, flooding can be imminent. The Tom and Jerry satellites, chasing each other high above the earth, help make important predictions - including about climate change. Between 200 and 300 gigatons of mass is lost from Greenland each year. "A gigaton is an ice cube the size of a cubic kilometre," Torsten Mayer-Gürr makes this - literally - gigantic consequence of climate change strikingly clear.

Astronomy / Space - Physics - 10.03.2021
How a ladybug warps space-time
How a ladybug warps space-time
Vienna quantum physicists measure the smallest gravitational force yet Researchers at the University of Vienna and the Austrian Academy of Sciences, led by Markus Aspelmeyer have succeeded in measuring the gravitational field of a gold sphere, just 2 mm in diameter, using a highly sensitive pendulum - and thus the smallest gravitational force.

Astronomy / Space - Earth Sciences - 19.02.2021
Life of a pure Martian design
Life of a pure Martian design
Experimental microbially assisted chemolithotrophy provides an opportunity to trace the putative bioalteration processes of the Martian crust. A study on the Noachian Martian breccia Northwest Africa (NWA) 7034 composed of ancient (ca. Gyr old) crustal materials from Mars, led by ERC grantee Tetyana Milojevic from the Faculty of Chemistry of the University of Vienna, now delivered a unique prototype of microbial life experimentally designed on a real Martian material.

Astronomy / Space - Materials Science - 27.11.2020
Laboratory experiments could unravel the mystery of the Mars moon Phobos
Laboratory experiments could unravel the mystery of the Mars moon Phobos
What causes the weathering of the Mars moon Phobos? Results from TU Wien give new insights, soon a spacecraft will retrieve soil samples. Of course, there is no weather in our sense of the word in space - nevertheless, soil can also "weather" in the vacuum of space if it is constantly bombarded by high-energy particles, such as those emitted by the sun.

Astronomy / Space - 15.10.2020
Star Clusters are only the tip of the iceberg
Star Clusters are only the tip of the iceberg
A panoramic view of the nearby Alpha Persei star cluster and its corona. The member stars in the corona are invisible. These are only revealed thanks to the combination of precise measurements with the ESA Gaia satellite and innovative machine learning tools (© Stefan Meingast, made with Gaia Sky) A telescopic view of the star cluster NGC 2516.

Astronomy / Space - Physics - 22.09.2020
Gravity causes homogeneity of the universe
Gravity causes homogeneity of the universe
"During its expansion, the universe evolved towards its present state, which is homogeneous and isotropic on large scales. This is inferred, among other things, from the measurement of the so-called background radiation as nicely seen in the full sky image of the WMAP data.

Physics - Astronomy / Space - 03.07.2020
TU Graz physicists study steel on board the ISS
TU Graz physicists study steel on board the ISS
By Birgit Baustädter For the Institute of Experimental Physics, heading into outer space is on the agenda: the researchers are taking part in an experiment on board the international space station to measure the surface tension of Böhler steel. "We've got something really great for you." When experimental physicist Gernot Pottlacher starts a phone call with these words, that's exactly what is behind it: something really great indeed.

Astronomy / Space - 14.04.2020
Beacon in space
Beacon in space
By Medienservice Satellite images from the BRITE mission with the participation of researchers from TU Graz and the Universities of Innsbruck and Vienna document for the first time the complete development of a nova - from eruption to maximum brightness and burn out. The publication has now appeared in the journal Nature Astronomy.

Astronomy / Space - Physics - 10.04.2020
Beacon in space
Beacon in space
BRITE Constellation observes complete nova eruption for the first time Satellite images from the BRITE mission with the participation of researchers* from Graz University of Technology and the Universities of Innsbruck and Vienna document for the first time the complete development of a nova - from eruption to maximum brightness and burn out.

Astronomy / Space - Computer Science - 07.01.2020
The giant in our stars
The giant in our stars
Interconnected stellar nurseries form the largest gaseous structure ever observed in the Milky Way galaxy. Astronomers of the University of Vienna and Harvard University have discovered a monolithic, wave-shaped gaseous structure - the largest ever seen in our galaxy - made up of interconnected stellar nurseries.

Astronomy / Space - Physics - 10.10.2019
'My work is flying through space'
’My work is flying through space’
By Birgit Baustädter Did you know that the first Austrian satellite to go into space was built in TU Graz's labs? TUGSAT-1 has been observing stars for more than six years - and it's not the only object made in Graz that is hurtling through space. "The night after the launch I was lying awake in bed and I thought to myself: amazing! This is something that I held in my hands and now it's flying through space," recalls Otto Koudelka, sitting at a glass conference table at the Inffeldgasse site in Graz.

Physics - Astronomy / Space - 02.10.2019
Quantum Vacuum: Less than Zero Energy
Quantum Vacuum: Less than Zero Energy
Is it possible to borrow energy from an empty space? And if yes, do we have to give it back? Energy values smaller than zero are allowed - at least within certain limits. Energy is a quantity that must always be positive - at least that's what our intuition tells us. If every single particle is removed from a certain volume until there is nothing left that could possibly carry energy, then a limit has been reached.

Earth Sciences - Astronomy / Space - 11.09.2019
Seen from orbit, everything's much more precise
Seen from orbit, everything’s much more precise
By Birgit Baustädter Torsten Mayer-Gürr surveys the Earth. He may work in an office in Steyrergasse in Graz, but his measuring device flies more than 400 kilometres overhead. Over 400 kilometres above us in the heavens, Tom and Jerry chased each other for years. One of them always out in front, the other in hot pursuit at a varying distance.

Astronomy / Space - Life Sciences - 04.09.2019
Searching for the Origin of Life across the Universe
Searching for the Origin of Life across the Universe
Researchers from European countries discuss life in the Universe at the University of Vienna Astrobiology is a young, rapidly developing branch of science that seeks to address the question of whether life exists, or has existed, elsewhere in the Universe. It is by nature an interdisciplinary science that explores the origins of life, the conditions, and processes that support or challenge life, the influence of different environmental conditions on preservation and detection of biosignatures of past and present life.

Physics - Astronomy / Space - 22.08.2019
Quantum gravity's tangled time
Quantum gravity’s tangled time
The theories of quantum mechanics and gravity are notorious for being incompatible, despite the efforts of scores of physicists over the past fifty years. However, recently an international team of researchers led by physicists from the University of Vienna, the Austrian Academy of Sciences as well as the University of Queensland (AUS) and the Stevens Institute of Technology (USA) have combined the key elements of the two theories describing the flow of time and discovered that temporal order between events can exhibit genuine quantum features.

Astronomy / Space - Physics - 24.04.2019
Rapid destruction of Earth-like atmospheres by young stars
Rapid destruction of Earth-like atmospheres by young stars
Researchers show young stars rapidly destroy Earth-like Nitrogen dominated atmospheres The discoveries of thousands of planets orbiting stars outside our solar system has made questions about the potential for life to form on these planets fundamentally important in modern science. Fundamentally important for the habitability of a planet is whether or not it can hold onto an atmosphere, which requires that the atmosphere is not completely lost early in the lifetime of the planet.

Astronomy / Space - Physics - 08.10.2018
String Theory: Is Dark Energy even Allowed?
String Theory: Is Dark Energy even Allowed?
A new conjecture causes excitement in the string theory community. Timm Wrase of the Vienna University of Technology has now published much-discussed results on recent new developments. In string theory, a paradigm shift could be imminent. In June, a team of string theorists from Harvard and Caltech published a conjecture which sounded revolutionary: String theory is said to be fundamentally incompatible with our current understanding of "dark energy" - but only with "dark energy" can we explain the accelerated expansion of our current universe.

Astronomy / Space - 05.10.2018
The threat of Centaurs for the Earth
The threat of Centaurs for the Earth
Astrophysicists calculate the impact probability and crater size of impacts due to minor bodies The astrophysicists Mattia Galiazzo and Rudolf Dvorak from the University of Vienna, in collaboration with Elizabeth A. Silber (Brown University, USA) investigated the long-term path development of Centaurs (solar system minor bodies which originally have orbits between Jupiter and Neptune).

Astronomy / Space - Earth Sciences - 31.08.2018
What's 'up' in space?
What’s ’up’ in space?
The International Astronomical Union has agreed on a new reference frame for directions in space. TU Wien played an important role in developing this new frame. In future, when spacecrafts are sent to other planets or when the rotation of planet Earth is studied, a new reference frame will be used. On 30 August, at the General Meeting of the International Astronomical Union (IAU) in Vienna, the new international celestial reference frame ICRF3 was adopted, allowing for more precise directional specifications in space.

Physics - Astronomy / Space - 24.07.2018
No sign of Symmetrons
No sign of Symmetrons
A high-precision experiment led by TU Wien has set its sights on pinpointing the so-far hypothetical "symmetron fields" using the PF2 ultra-cold neutron source at the Institut Laue-Langevin in France. For the existence of symmetrons could provide an explanation for the mysterious dark energy. One thing is certain: there's something out there we don't yet know.