MAUNAKEA, Hawaii — Using the world’s most powerful telescopes, an international team of astronomers has discovered a massive galaxy that consists almost entirely of Dark
A possible SETI signal?
A star system 94 light-years away is in the spotlight as a possible candidate for intelligent inhabitants, thanks to the discovery of a radio signal by a group of Russian astronomers.
HD 164595, a solar system a few billion years older than the Sun but centered on a star of comparable size and brightness, is the purported source of a signal found with the RATAN-600 radio telescope in Zelenchukskaya, at the northern foot of the Caucasus Mountains. This system is known to have one planet, a Neptune-sized world in a very tight orbit, making it unattractive for life. However, there could be other planets in this system that are still undiscovered.
The signal seems to have been discussed in a presentation given by several Russian astronomers as well as Italian researcher, Claudio Maccone, the Chair of the International Academy of Astronautics Permanent SETI Committee. Maccone has recently sent an email to SETI scientists in which he describes this presentation, including the signal ascribed to star system HD 164595.
Are Fast Radio Bursts (FRB) an answer to Dark Matter?
https://m.phys.org/news/2016-08-cosmic-enigma-astrophysicists-fast-radio.html
A massive cluster of yellowish galaxies, seemingly caught in a red and blue spider web of eerily distorted background galaxies, makes for a spellbinding picture from the new Advanced Camera for Surveys aboard NASA’s Hubble Space Telescope. To make this unprecedented image of the cosmos, Hubble peered straight through the center of one of the most massive galaxy clusters known, called Abell 1689. The gravity of the cluster’s trillion stars — plus dark matter — acts as a 2-million-light-year-wide lens in space. This gravitational lens bends and magnifies the light of the galaxies located far behind it. Some of the faintest objects in the picture are probably over 13 billion light-years away (redshift value 6). Strong gravitational lensing as observed by the Hubble Space Telescope in Abell 1689 indicates the presence of dark matter. Credit: NASA, N. Benitez (JHU), T. Broadhurst (Racah Institute of Physics/The Hebrew University), H. Ford (JHU), M. Clampin (STScI),G. Hartig (STScI), G. Illingworth (UCO/Lick Observatory), the ACS Science Team and ESA
Mars definitely deserves its Red Planet nickname. But scientists use such a range of photographing techniques that the planet can end up a rainbow of colors.
Source: www.businessinsider.com/new-mars-reconnaissance-orbiter-hirise-photos-2016-8/
Great little project for an all weather sky camera.
An all sky camera is a device designed to take pictures of the entire sky over a certain amount of time, usually to monitor meteor showers or other astronomical…
Portrait of Dr. Erhard Hänssgen’s 42 inch (107 cm) Dobsonian Telescope
Source: www.cruxis.com/scope/scope1070.htm
More details –
http://www.cruxis.com/scope/scope1070_construction.htm