Exoplanets can orbit close to their host star. When the host star is much hotter than our sun, then the exoplanet becomes as hot as a star. The hottest 'ultra-hot' planet was discovered last year. Today, a team led by UNIGE discovered the presence of iron and titanium vapors in the atmosphere of this planet. This detection was made possible by the surface temperature of this planet, which reaches more than 4,000 degrees.
International team of scientists from Russia (including a research associate of the Kourovka Astronomical Observatory of Ural Federal University Sergei Parfenov), Germany, Italy, USA and France discovered relatively high concentration of formic acid in the protoplanetary disk. This is the first organic molecule found in protoplanetary disks, containing two oxygen atoms.
The detection of 'mini-moons' -- small asteroids temporarily captured in orbit around Earth -- will vastly improve our scientific understanding of asteroids and the Earth-moon system. Small and fast-moving, they have evaded detection by existing technology, with only one confirmed mini-moon discovery to date. The advent of the Large Synoptic Survey Telescope could verify their existence and track their paths around our planet, presenting exciting scientific and commercial opportunities.
An unusual kind of star-planet hybrid atmosphere is emerging from studies of ultrahot planets orbiting close to other stars.
A Japan-based research team led by Kanazawa University equipped the Arase satellite with sensors to study the convoluted interactions between high-energy particles in the inner magnetosphere and the Earth's electric and magnetic field. They have collected their first set of data from the satellite and from ground-based sensors, which they will soon analyze. Their approach promises to provide better predictions of harmful bursts of high-energy particles from the magnetosphere.
Volatiles -- such as water, carbon dioxide and the noble gases -- come out of the earth's interior through volcanism and may be injected into the mantle from the atmosphere, a pair of processes called mantle degassing and regassing. The exchange controls the habitability of the planet. This transport could not have begun much before 2.5 billion years ago, according to new research that also establishes a range of dates during which the Earth shifted to a net regassing regime.
Forty-four planets in solar systems beyond our own have been unveiled in one go, dwarfing the usual number of confirmations from extrasolar surveys, which is typically a dozen or less. The findings will improve our models of solar systems and may help researchers investigate exoplanet atmospheres. Novel techniques developed to validate the find could hugely accelerate the confirmation of more extrasolar planet candidates.
Chorus waves are electromagnetic waves. Converted to sound they sound like singing and chirping birds at dawn. They can cause polar lights above the Earth as well as damage to satellites. Now, a team of researchers led by Yuri Shprits of GFZ German Research Centre for Geosciences found that such waves are intensified millionfold around Jupiter's moon Ganymede. This study provides important observational constraints for theoretical studies.
Before NASA's Transiting Exoplanet Survey Satellite (TESS) started science operations on July 25, 2018, the planet hunter sent back a stunning sequence of serendipitous images showing the motion of a comet.
The origin of organic matter found in meteorites that formed during the birth of the solar system 4.5 billion years ago may provide key clues to understanding the birth of life here on Earth. It could also help astronomers investigate the potential habitability of other solar systems. That's according to a new study led by the University of Manchester.