News tagged with stars

The ultraviolet diversity of supernovae

Supernovae, the explosive deaths of massive stars, are among the most momentous events in the cosmos because they disburse into space all of the chemical elements that were produced inside their progenitor stars, including ...

dateSep 28, 2016 in Astronomy
shares42 comments 0

ALMA explores the Hubble Ultra Deep Field

An international team of astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) has explored the same distant corner of the universe first revealed in the iconic image of the Hubble Ultra Deep Field (HUDF).

dateSep 22, 2016 in Astronomy
shares329 comments 0

Galactic fireworks illuminate monster hydrogen blob

An international team of researchers using the Atacama Large Millimeter/submillimeter Array (ALMA) and other telescopes has discovered the power source illuminating a so-called Lyman-alpha Blob – a rare, brightly glowing, ...

dateSep 21, 2016 in Astronomy
shares44 comments 0

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

Know thy star, know thy planet

When it comes to exoplanets, astronomers have realized that they only know the properties of the planets they discover as well as they know the properties of the stars being orbited. For a planet's size, precisely characterizing ...

dateSep 14, 2016 in Astronomy
shares238 comments 1

Astronomers observe star reborn in a flash

An international team of astronomers using Hubble have been able to study stellar evolution in real time. Over a period of 30 years dramatic increases in the temperature of the star SAO 244567 have been observed. Now the ...

dateSep 13, 2016 in Astronomy
shares2189 comments 2

A riddle for our time

One of the most remarkable successes of astrophysics in the last century was its discovery that the age of the universe as measured by its oldest stars was about the same as the age estimated in an entirely different way, ...

dateSep 12, 2016 in Astronomy
shares862 comments 39