• 89 Posts
  • 83 Comments
Joined 2 years ago
cake
Cake day: August 10th, 2023

help-circle












  • The abstract from their article

    It is commonly believed that our own Milky Way is on a collision course with the neighbouring Andromeda galaxy. As a result of their merger, predicted in around 5 billion years, the two large spiral galaxies that define the present Local Group would form a new elliptical galaxy. Here we consider the latest and most accurate observations by the Gaia and Hubble space telescopes, along with recent consensus mass estimates, to derive possible future scenarios and identify the main sources of uncertainty in the evolution of the Local Group over the next 10 billion years. We found that the next most massive Local Group member galaxies—namely, M33 and the Large Magellanic Cloud—distinctly and radically affect the Milky Way–Andromeda orbit. Although including M33 increases the merger probability, the orbit of the Large Magellanic Cloud runs perpendicular to the Milky Way– Andromeda orbit and makes their merger less probable. In the full system, we found that uncertainties in the present positions, motions and masses of all galaxies leave room for drastically different outcomes and a probability of close to 50% that there will be no Milky Way–Andromeda merger during the next 10 billion years. Based on the best available data, the fate of our Galaxy is still completely open.

    Till Sawala, Jehanne Delhomelle, Alis J. Deason, Carlos S. Frenk, Jenni Häkkinen, Peter H. Johansson, Atte Keitaanranta, Alexander Rawlings & Ruby Wright

    https://www.nature.com/articles/s41550-025-02563-1.pdf












  • From their article

    Abstract

    Liquid water was abundant on Mars during the Noachian and Hesperian periods but vanished as the planet transitioned into the cold, dry environment we see today. It is hypothesized that much of this water was either lost to space or stored in the crust. However, the extent of the water reservoir within the crust remains poorly constrained due to a lack of observational evidence. Here, we invert the shear wave velocity structure of the upper crust, identifying a significant low-velocity layer at the base, between depths of 5.4 and 8 km. This zone is interpreted as a high-porosity, water-saturated layer, and is estimated to hold a liquid water volume of 520–780 m of global equivalent layer (GEL). This estimate aligns well with the remaining liquid water volume of 710–920 m GEL, after accounting for water loss to space, crustal hydration, and modern water inventory.




  • BevelGear@beehaw.orgtoPrivacy@lemmy.mlMullvad or Proton VPN?
    link
    fedilink
    arrow-up
    6
    arrow-down
    1
    ·
    2 months ago

    Proton’s statement from the linked article

    “We are aware of the Spanish terrorism case involving alleged threats to the King of Spain, but as a general rule, we do not comment on specific cases. Proton has minimal user information, as illustrated by the fact that in this case, data obtained from Apple was used to identify the terrorism suspect. Proton provides privacy by default and not anonymity by default because anonymity requires certain user actions to ensure proper OPSEC, such as not adding your Apple account as an optional recovery method.”










  • From my experience, kids can be some of the cruelest people just to fit in/be funny/feel superior at the cost of others. It’s a part of your past and you can’t change that, but you can change who you’ll become. It’s not easy being a good person and you’re going to have tough choices to make, but it’s the right thing to do.

    I do understand that abused kids have a higher tendency to abuse others and that is a more complicated issue that this statement does not pertain to.

    I also concede that there are kids that never grow up, unfortunately.