Four planets will align in the pre-dawn sky this week
Mercury, Mars and Saturn will be visible before sunrise, with Neptune requiring a telescope.
Best seen 60–90 minutes before sunrise, looking east.
u/JornalcienciaPT — 3 days ago
u/JornalcienciaPT
A natural “space laser” traveled 8 billion years to reach us
Astronomers have detected the most distant megamaser ever observed, born from colliding galaxies.
This powerful cosmic signal acts like a natural laser, revealing how galaxies formed in the early Universe.
https://jornalciencia.pt/um-laser-cosmico-atravessa-8-mil-milhoes-de-anos-de-universo/?lang=en
u/JornalcienciaPT — 6 days ago