Hubble Space Telescope Photographed An Old Core-Collapse Supernova Just As It Exploded
Astronomers recently discovered an 11.5 billion old supernova in old Hubble photos.
Are Stellar Zombies Real?
The recent attention on the neutron star merger GW170817 has made many people, who would not otherwise come across astronomy online, curious about space and specifically gravitational waves sources like neutron stars. I love this type of star so what is more fitting than to spread the love. I previously presented you three crazy features in neutron stars, one of them being the accreting nature in binary systems – and these are exactly the systems we will look into here.
Dead Stars Are Dense Stars
These days neutron stars are big in the media, partially because they are such extreme objects. But what exactly is a neutron star – and how do you put something so extreme into perspective? Let’s try.
Gold From A Galaxy Far, Far Away
Monday earlier this week the internet exploded with the news from ESO that two neutron stars merged in the galaxy NGC4993 located 130 million light years away. This was measured on August 17 this year and the discovery was therefore named GW170817, which is short for ‘Gravitational Wave on August 17, 2017’ as measured by LIGO in USA and Virgo in Europe.
The Golden Merger Of Neutron Stars
Yesterday ESO announced the discovery of gravitational waves and electromagnetic radiation, that originated from a neutron star merger in a galaxy far, far away. Media from all over the world covered the story as it was revealed that some 3,000 scientists had worked for six weeks to decipher the signal, that was received in multiple telescopes and observatories on August 17 this year.