New observations of an oddball planetary system 150 light-years from Earth may force astronomers to rethink the textbook definition of a planet and the accepted idea about how such a body forms. The observations suggest that either some planets are superheavy or that planets can form from disks of gas and dust that encircle not just a single star but two starlike objects.
Two years ago, when astronomers at the Geneva Observatory in Sauverny, Switzerland, reported their findings on the sunlike star HD 202206, nothing seemed out of the ordinary. The team announced that a body at least 17.4 times as heavy as Jupiter orbits the star. The unseen body resides at an average distance from the star of 0.82 times the Earth-sun distance.
The same team, led by Alexandre Correia of the University of Aveiro in Portugal, has now found evidence for a second unseen body orbiting HD 202206. This object is at least 2.4 times as heavy as Jupiter and resides at an average distance from the star of 2.55 times the Earth-sun distance, the researchers report (http://xxx.lanl.gov/abs/ astro-ph/0411512).
Only an atom thick: Physicists succeed in measuring mechanical properties of 2D monolayer materials
17.01.2018 | Universität des Saarlandes
Black hole spin cranks-up radio volume
15.01.2018 | National Institutes of Natural Sciences
What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...
For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.
Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...
At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.
No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...
Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.
Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...
The oceans are the largest global heat reservoir. As a result of man-made global warming, the temperature in the global climate system increases; around 90% of...
08.01.2018 | Event News
11.12.2017 | Event News
08.12.2017 | Event News
17.01.2018 | Ecology, The Environment and Conservation
17.01.2018 | Physics and Astronomy
17.01.2018 | Awards Funding