7 days ago

Dark Matter Dynamics, Solar Flare Trio, and Meteor Shower Wonders: S28E07

SpaceTime Series 28 Episode 07

Dark Matter's Role in Milky Way's Stellar Streams

New research suggests that dark matter may have influenced the formation of the GD-1 stellar stream in the Milky Way. A study in the Astrophysical Journal Letters proposes that a core-collapsing, self-interacting dark matter subhalo could explain the unusual spur and gap features observed in the stream. This finding could deepen our understanding of dark matter's properties and its influence on the universe.

Sun's Triple Solar Flare Eruption

The Sun has unleashed three significant X-class solar flares in a single day, with the first and third being X1.1 flares and the second an X1.5. These powerful eruptions, detected by NOAA's Solar Ultraviolet Imager, are part of the Sun's approach to solar maximum, the peak of its 11-year solar cycle. Solar flares can disrupt Earth's communications, power grids, and pose health risks to astronauts.

Quadrantids Meteor Shower Spectacle

The Earth is experiencing the Quadrantids meteor shower, offering a dazzling display of shooting stars. Originating from the near-Earth asteroid 2003 EH1, the Quadrantids are best viewed from dark locations, with peak sightings expected in the Pacific region. Sky watchers can anticipate around 50 meteors per hour, with potential fireballs enhancing the spectacle.

00:00 This is space time series 28 episode 7 for broadcast on 15 January 2025

00:46 New research proposes a self interacting dark matter subhalo could explain GD1 features

04:24 The sun unleashed three significant X class solar flares on the same day

07:19 Earth is experiencing one of its most spectacular meteor showers, the Quadrantids

14:31 A quarter of the world's freshwater animals are at risk of extinction

16:43 Facebook boss Mark Zuckerberg admits that his fact checkers are dishonest

20:28 CES has wrapped up in Las Vegas with lots of interesting gadgets

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✍️ Episode References

University of California, Riverside

[ucr.edu](https://www.ucr.edu/)

Astrophysical Journal Letters

[iopscience.iop.org/journal/

8205](https://iopscience.iop.org/journal/2041-8205)

3--- National Oceanographic and Atmospheric Administration (NOAA)

[noaa.gov](https://www.noaa.gov/)

Royal Astronomical Society

[ras.ac.uk](https://www.ras.ac.uk/)

Journal of Nature