Astronomers have imaged dozens of protoplanetary discs around Milky Way stars, seeing them at all stages of formation. Now, one of these discs has been found for the first time — excitingly — in another galaxy. The discovery was made using the Atacama Large Millimeter/Submillimeter Array (ALMA) in Chile along with the , which detected the telltale signature of a spinning disc around a massive star in the Large Magellanic Cloud, located 160,000 light-years away.Continue reading “A Protoplanetary Disc Has Been Found… in Another Galaxy!”
Our galaxy’s largest nearby companion is the Large Magellanic Cloud (LMC), a dwarf galaxy visible to the naked eye in the Southern Hemisphere. In recent years, new theoretical research and better observational capabilities have taught astronomers a great deal about our (not-so-little) neighbour. It’s becoming increasingly clear that the LMC is helping shape the Milky Way’s evolution.Continue reading “The Milky Way has Trapped the Large Magellanic Cloud With its Gravity. What Comes Next?”
Hypervelocity stars (HVS) certainly live up to their name, traveling thousands of kilometers per second or a fraction of the speed of light (relativistic speeds). These speed demons are thought to be the result of galactic or black hole mergers, globular clusters kicking out members, or binary pairs where one star is kicked out when the other goes supernova. Occasionally, these stars are fast enough to escape our galaxy and (in some cases) take their planetary systems along for the ride. This could have drastic implications for our theories of how life could be distributed throughout the cosmos (aka. panspermia theory).
There are thousands of these stars in our galaxy, and tracking them has become the task of cutting-edge astrometry missions (like the ESA’s Gaia Observatory). In previous research, astronomers suggested that these stars could be used to determine the mass of the Milky Way. In a recent study from Leiden University in the Netherlands, Ph.D. candidate Fraser Evans showed how data on HVS could be used to probe the mysteries of the most extreme objects in our Universe – supermassive black holes (SMBHs) and the violent supernovae of massive stars.Continue reading “Hypervelocity Stars Teach us About Black Holes and Supernovae”
The Tarantula Nebula, also called 30 Doradus, is the brightest star-forming region in our part of the galaxy. It’s in the Large Magellanic Cloud (LMC) and contains the most massive and hottest stars we know of. The Tarantula Nebula has been a repeat target for the Hubble since the telescope’s early years.
Continue reading “Hubble’s New View of the Tarantula Nebula”
Open star clusters are groups of stars in loosely-bound gravitational associations. The stars are further apart than the stars in their cousins, the globular clusters. The weak gravity from the loose clusters means open clusters take on irregular shapes. They usually contain only a few thousand stars.
The Hubble Space Telescope captured images of two clusters in the Large Magellanic Cloud.Continue reading “Hubble Spots Two Open Clusters. One is Also an Emission Nebula”
ESA and NASA dusted off some old data from four retired space telescopes and combined forces to reveal new images of the four galaxies that our closest to our own Milky Way galaxy. One thing is common among the four new images: they are full of dust!Continue reading “A Totally new View of the Large Magellanic Cloud (and more!) From Retired Telescopes”
The James Webb Space Telescope is now in the final phase of commissioning as it readies for science observations. Of the more than 1,000 milestones the observatory has needed to reach since launch to become fully operational, the team said today they are down to about two hundred activities to go. But those 200 are all part of the final phase of commissioning the instruments.
“I call it the home stretch,” said Michael McElwain, Webb observatory project scientist in a media briefing on May 9. “There are 17 scientific modes we need to bring online in the next two months, and we need to demonstrate the telescope’s operational capabilities before we are ready to turn the science instruments loose on the Universe.”Continue reading “Webb is Almost Ready. There’s One Last Thing To Do”
The Small Magellanic Cloud (SMC) is over 200,000 light-years away, yet it’s still one of our galaxy’s closest neighbours in space. Ancient astronomers knew of it, and modern astronomers have studied it intensely. But the SMC still holds secrets.
By studying it and revealing its structure in more detail, astronomers at The Australian National University hope to grow our understanding of the SMC and galaxies in general.Continue reading “An Incredible View Into the Heart of the Small Magellanic Cloud”
Astronomers have found a smaller, stellar-mass black hole lurking in a nearby satellite galaxy of our own Milky Way. The black hole has been hiding in a star cluster named NGC 1850, which is one of the brightest star clusters in the Large Magellanic Cloud. The black hole is 160,000 light-years away from Earth, and is estimated to be about 11 times the mass of our Sun.Continue reading “A Black Hole has been Found Lurking Just Outside the Milky Way”
Astronomers have known for years that galaxies are cannibalistic. Massive galaxies like our own Milky Way have gained mass by absorbing smaller neighbours.
Now it looks like smaller galaxies like the Large Magellanic Cloud have also feasted on smaller neighbours.Continue reading “The Large Magellanic Cloud Stole one of its Globular Clusters”