This Collision Could Have Created the Solar System | SciShow News

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A dwarf galaxy crashing through the Milky Way billions of years ago could have set off periods of star formation, and astronomers recently captured a rare flashing phenomenon that only shows up in the sky for a few days!

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Sources:
https://www.nature.com/articles/s41550-020-1097-0
https://www.esa.int/Science_Exploration/Space_Science/Gaia/Galactic_crash_may_have_triggered_Solar_System_formation
https://archive.vn/20161215133821/https://www.scientificamerican.com/article/sagittarius-satellite-spiral/
https://sci.esa.int/web/gaia/-/28820-summary
https://iopscience.iop.org/article/10.3847/2041-8213/ab8cc7
https://www.eurekalert.org/pub_releases/2020-05/nu-acn052620.php

Image Sources:
Thumbnail credit: Gabriel Pérez Díaz, SMM (IAC)"
https://www.videoblocks.com/video/butterfly-flaps-its-wings-close-up-of-an-alpha-channel-vcabm1otlim46opjg
https://www.istockphoto.com/vector/tornado-hurricane-3d-vector-icon-set-gm1179999726-330404909
https://www.videoblocks.com/video/butterflies-on-a-transparent-background-rgnhzwr3rk39ryfad
http://www.esa.int/ESA_Multimedia/Images/2018/09/The_Sagittarius_dwarf_galaxy_in_Gaia_s_all-sky_view
https://sci.esa.int/web/gaia/-/galactic-crash-may-have-triggered-solar-system-formation
https://sci.esa.int/web/gaia/-/51976-gaia-scanning-the-sky
https://commons.wikimedia.org/wiki/File:Gaia_Milky_Way_star_density_map_2015-07-03.png
https://images.nasa.gov/details-PIA21461
https://svs.gsfc.nasa.gov/11541
https://www.eurekalert.org/pub_releases/2020-05/nu-acn052620.php
https://commons.wikimedia.org/wiki/File:Teleskopy_ASAS_OGLE.jpg
https://news.northwestern.edu/stories/2020/05/astrophysicists-capture-new-class-of-transient-objects/&fj=1