Cosmos (category filter × )

From the Lunar far side, China’s rover reveals moon’s hidden depths

scientificamerican.com
  • Chinese scientists publish data on the mission Chang'e-4 that landed in a crater at the south pole of the moon.
  • According to the published information, the lunar mantle is composed mainly of pyroxene and olivine.
  • These chemical elements were detected by means of spectroscopic sensors installed in the spaceship.
  • Researchers expect to confirm this information by analyzing samples that will be brought to earth in a future mission.

New clues about how ancient galaxies lit up the Universe

sciencedaily.com
  • Observations by NASA´s Spitzer Space Telescope indicated that some of the first galaxies that originated about a billion years after the big bang were brighter than the stars we perceive today.
  • According to the researches, such brilliance was caused by the ionizing radiation generated for the release of electrons from the hydrogen atoms that existed in the early universe.
  • This cosmic event known as the hydrogen reionization transformed the original opaque cosmos into the sparkling universe we see today.
  • The NASA / CSA / ESA James Webb Space Telescope to be launched in 2021 will investigate the possible causes that originated this formidable cosmic phenomenon.

Cosmology has some big problems

blogs.scientificamerican.com
  • This article questions and criticizes the validity of the big bang theory of the universe according to which the universe expands at an increasing velocity and it is constituted mainly by dark matter and dark energy.
  • According to the author, there is no observable empirical evidence to support this theory and some discrepancies have been observed about the existence of dark matter in all parts of the cosmos and in the measurements of the expansion rate of the universe.
  • The existence of dark matter and dark energy has been postulated to explain some discrepancies between the theory of relativity and the behavior observed in galaxies.
  • The analysis suggests that the big bang theory is a hypothesis created by cosmologists to explain Einstein's theory of general relativity.

Astronomers find oldest type of molecule in space

astronomy.com
  • In a symbolic victory for science, researchers have finally observed the ion which started the chemistry of the Universe - helium hydride (HeH+).
  • Attempts to capture it by combing through nebulae have been going on since the 1970s but failed since HeH+ is too easily absorbed by Earth’s atmosphere.
  • The new study succeeded thanks to the Stratospheric Observatory for Infrared Astronomy (SOFIA) - an observatory on an airplane.
  • While not revolutionary, this discovery confirms theories about the early universe and puts an end to a decades-long search.

Travel through wormholes is possible, but slow

phys.org
  • A team led by Harvard physicist Daniel Jafferis developed a new theory which connects gravity with quantum mechanics.
  • Using quantum field theory tools, the team shows that tunnels in curved space-time connecting two distant places can exist, and be used for travel.
  • The theory is based on a setup created by Einstein and Rosen - a connection between two black holes now known as a wormhole.
  • The problem is the direct connection between black holes is shorter than the wormhole connection, so it wouldn’t be very useful.
  • The main benefits of this study are new insights into quantum mechanics.

Newsletter

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  • Science Science (23) Dark-matter detector observes exotic nuclear decay
  • Psychology Psychology (23) The surprising truth about perfectionism in millennials
  • Cosmos Cosmos (13) From the Lunar far side, China’s rover reveals moon’s hidden depths
  • History History (9) Ancient rock art in the plains of India
  • Society Society (29) Psychedelics' role in beating alcoholism illustrated in LSD, psilocybin study
  • Medicine Medicine (13) End to Aids in sight as huge study finds drugs stop HIV transmission
  • Technology Technology (20) UVM study: AI can detect depression in a child’s speech
  • Nature Nature (13) Wood wide web: Trees' social networks are mapped