Tag

Galactic Dynamics

All articles tagged with #galactic dynamics

space27 days ago•5 min saved

Milky Way Edge Revealed: Star-Forming Boundary About 40,000 Light-Years Out

New analysis of 100k giant stars from APOGEE-DR17, LAMOST-DR3, and Gaia shows the Milky Way’s edge lies at 11.28–12.15 kpc (about 40,000 ly) from the center, defined as the end of the star-forming region; the observed U-shaped age trend (older inwards, younger toward the edge, then older beyond) reflects star migration under spiral arms and the bar, with three factors—outer Lindblad resonance, a galactic warp, and thin gas—likely causing the cut-off, classifying the Galaxy as Type-II.

via ScienceAlert|

#astronomy #galactic-dynamics #galaxy-structure

science7 months ago•4 min saved

Mystery Wave Ripples Through the Milky Way

Scientists using Gaia data have discovered a massive wave rippling through the Milky Way's disc, affecting stars thousands of light-years from the center, likely caused by past galactic interactions, though the exact cause remains unknown.

via Science Daily|

#gaia-telescope #galactic-dynamics #galaxy-wave

science1 year ago•3 min saved

Hubble Captures Milky Way Stealing Gas from Neighbor Galaxy

The Hubble Space Telescope has observed the Milky Way stripping gas from its smaller neighbor, the Large Magellanic Cloud (LMC), reducing its halo size significantly. Despite this, the LMC retains enough gas to continue forming new stars. This interaction provides insights into galactic dynamics and evolution, as researchers use Hubble's ultraviolet capabilities to study the LMC's halo through quasar light absorption. The study highlights the complex interactions between galaxies and their halos, with further research planned to explore the collision region between the LMC and Milky Way halos.

via Space.com|

#galactic-dynamics #hubble-telescope #large-magellanic-cloud

astronomy2 years ago•3 min saved

Possible Captured Planets Found in Oort Cloud

A new study published in the Monthly Notices of the Royal Astronomy Society suggests that up to 10% of a star's original planets could be cast adrift into deep space, and there is about a 7% chance that our solar system has a captured ice giant planet in the Oort cloud. The study shows that planetary systems don't always form in isolation, and there are plenty of star systems that are likely blended families.

via Universe Today|

#astronomy #captured-planets #galactic-dynamics