Astronomy news

Stellar ghosts reveal galactic origins

Our sky is blanketed in a sea of stellar ghosts; all potential phantoms that have been dead for millions of years and yet we don't know it yet. That is what we will be discussing today. What happens to the largest of our ...

dateSep 21, 2016 in Astronomy
shares19 comments 2

X-ray telescope X-Calibur flies high above New Mexico

On Sept. 19, Henric Krawczynski, the principal investigator on the X-Calibur telescope mission, announced on the mission blog that the telescope had landed safely near the border between Arizona and New Mexico. The team retrieved ...

dateSep 21, 2016 in Astronomy
shares14 comments 0

Astronomers discover five new Neptune trojans

(—An international team of astronomers led by Hsing-Wen Lin of the National Central University in Taiwan has detected five new so-called "Neptune trojans" – minor bodies sharing the same orbit as the planet Neptune. ...

dateSep 20, 2016 in Astronomy report
shares1312 comments 1

Stellar activity can mimic misaligned exoplanets

The occultation of stellar active regions during the planetary transit can lead to inaccurate estimates of the characteristics of these exoplanets, especially the spin-orbit tilt angle. This was the conclusion of simulations ...

dateSep 20, 2016 in Astronomy
shares19 comments 1

Twin jets pinpoint the heart of an active galaxy

An international team of astronomers has measured the magnetic field in the vicinity of a supermassive black hole. A bright and compact feature of only 2 light days in size was directly observed by a world-wide ensemble of ...

dateSep 19, 2016 in Astronomy
shares641 comments 30

Migrating exoplanets

Many known exoplanets orbit close to their host star, within one-tenth of an astronomical unit (one AU is the average distance of the Earth from the Sun). Since their orbital periods are therefore very short and their gravitational ...

dateSep 19, 2016 in Astronomy
shares507 comments 2

The death of a planet nursery?

The dusty disk surrounding the star TW Hydrae exhibits circular features that may signal the formation of protoplanets. LMU astrophysicist Barbara Ercolano argues, however, that the innermost actually points to the impending ...

dateSep 19, 2016 in Astronomy
shares29 comments 0

The Dynamic Duo: RAVE complements Gaia

The new data release of the Radial Velocity Experiment (RAVE) is the fifth spectroscopic release of a survey of stars in the southern celestial hemisphere. It contains radial velocities for 520 781 spectra of 457 588 unique ...

dateSep 19, 2016 in Astronomy
shares52 comments 0