Above: This artist’s impression shows the dust and gas around the double star system GG Tauri-A. Researchers using ALMA have detected gas in the region between two discs in this binary system. This may allow planets to form in the gravitationally perturbed environment of the binary. Half of Sun-like stars are born in binary systems, meaning that these findings will have major consequences for the hunt for exoplanets. Credit: ESO/L. Calçada
The most recent issue of Free Astronomy Magazine (September-October 2021) is available for your reading and downloading pleasure at www.astropublishing.com.
This issue features our fearless leader Michele Ferrara providing all of the original content (as I prepared for and adjusted to fatherhood x 2) among the selection of articles spanning the range from frozen snow balls in our own solar system to the evolution of the whole universe.
Browser-readable version: www.astropublishing.com/5FAM2021/
Jump to the PDF download (14.7 MB): September-October 2021
Above: Natural color images of the planet Venus as taken by the JAXA Akatsuki probe. Imaging in the ultraviolet, visible, and infrared, Akatsuki is providing a wealth of atmospheric information as it orbits Venus every 10 days. JAXA/ISAS/DARTS/Damia Bouic
The most recent issue of Free Astronomy Magazine (July-August 2021) is available for your reading and downloading pleasure at www.astropublishing.com.
The cover article highlights the recent selections of the DAVINCI+ and VERITAS missions in the interest of greatly expanding our understanding of our sister planet Venus. Germane to several articles in previous issues, this improved understanding will address (1) what happened to Venus to make it the hellish (relatively speaking, of course) landscape that it is and (2) if Venus might be the fate of all rocky planets on the too-hot-side of stellar Goldilocks Zones after enough time has passed. If the answer to (2) is “yes,” that might mean that any future explorations of such planets in other solar systems will be (exo)paleontological/archaeological in nature. It might also mean that any existing life forms are going to be real tough hombres.
Our editor Michele continues his discussion and documentation of recent efforts to identify and classify (often) technological extraterrestrial intelligences – provided they reveal themselves, of course. In this issue, the ichnoscale (footprint scale) is presented, “which defines the relative value of a hypothetical alien technosignature with respect to its terrestrial expression.” What one might take from the several recent issues where Michele discusses these topics is that there is an active component of the SETI-and-similar community that is hedging the discovery bets on the assumption that aliens will be more-or-less at our point of technological development – and will have produced similar signals of their presence because they will have evolved in a similar way (nothing -> combustion -> renewables). Ask again when Webb is up and running.
Browser-readable version: www.astropublishing.com/4FAM2021/
Jump to the PDF download (13.1 MB): July-August 2021