european space exploration
Jet Propulsion Laboratory, Pasadena, Calif.
Dwayne Brown / Laurie Cantillo
NASA Headquarters, Washington
European Space Agency, Noordwijk, Netherlands
M. Ramy El-Maarry
University of Colorado
ESA Rosetta project scientist
NOTE: Make sure you check 0ut the accompanying Space Photo Exploration page for Comet 67P/Churyumov-Gerasimenko
Director, Max-Planck-Institut für extraterrestrische Physik
Garching bei München, Germany
March 15, 2017
VLT observations of distant galaxies suggest they were dominated by normal matter
We see normal matter as brightly shining stars, glowing gas and clouds of dust. But the more elusive dark matter does not emit, absorb or reflect light and can only be observed via its gravitational effects. The presence of dark matter can explain why the outer parts of nearby spiral galaxies rotate more quickly than would be expected if only the normal matter that we can see directly were present .
This research was presented in a paper entitled “Dust in the Reionization Era: ALMA Observations of a z =8.38 Gravitationally-Lensed Galaxy”
by Laporte et al., to appear in The Astrophysical Journal Letters.