Catálogo de publicaciones - revistas

<jats:title>Cassini's last look at Saturn's rings</jats:title> <jats:p> During the final stages of the Cassini mission, the spacecraft flew between the planet and its rings, providing a new view on this spectacular system (see the Perspective by Ida). Setting the scene, Spilker reviews the numerous discoveries made using Cassini during the 13 years it spent orbiting Saturn. Iess <jats:italic>et al.</jats:italic> measured the gravitational pull on Cassini, separating the contributions from the planet and the rings. This allowed them to determine the interior structure of Saturn and the mass of its rings. Buratti <jats:italic>et al.</jats:italic> present observations of five small moons located in and around the rings. The moons each have distinctive shapes and compositions, owing to accretion of ring material. Tiscareno <jats:italic>et al.</jats:italic> observed the rings directly at close range, finding complex features sculpted by the gravitational interactions between moons and ring particles. Together, these results show that Saturn's rings are substantially younger than the planet itself and constrain models of their origin. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6445" page="1046" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aat3760">1046</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aat2965">eaat2965</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aat2349">eaat2349</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aau1017">eaau1017</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6445" page="1028" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aaw3098">1028</jats:related-article> </jats:p>

<jats:title>Cassini's last look at Saturn's rings</jats:title> <jats:p> During the final stages of the Cassini mission, the spacecraft flew between the planet and its rings, providing a new view on this spectacular system (see the Perspective by Ida). Setting the scene, Spilker reviews the numerous discoveries made using Cassini during the 13 years it spent orbiting Saturn. Iess <jats:italic>et al.</jats:italic> measured the gravitational pull on Cassini, separating the contributions from the planet and the rings. This allowed them to determine the interior structure of Saturn and the mass of its rings. Buratti <jats:italic>et al.</jats:italic> present observations of five small moons located in and around the rings. The moons each have distinctive shapes and compositions, owing to accretion of ring material. Tiscareno <jats:italic>et al.</jats:italic> observed the rings directly at close range, finding complex features sculpted by the gravitational interactions between moons and ring particles. Together, these results show that Saturn's rings are substantially younger than the planet itself and constrain models of their origin. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6445" page="1046" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aat3760">1046</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aat2965">eaat2965</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aat2349">eaat2349</jats:related-article> , p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" related-article-type="in-this-issue" xlink:href="10.1126/science.aau1017">eaau1017</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6445" page="1028" related-article-type="in-this-issue" vol="364" xlink:href="10.1126/science.aaw3098">1028</jats:related-article> </jats:p>

<jats:p>As the United States heads toward an election year in 2020, climate change promises to stay in the headlines. Increasing public concern about and desire to address the consequences of global warming drive this attention, along with the debate about a Green New Deal that promotes social justice alongside accelerated deep reductions in greenhouse gas emissions. Now is the time to translate these aspirations into action within the constraints of technical, cost, and social realities. This is optimization, not compromise—call it a Green Real Deal.</jats:p>

<jats:p>A roundup of weekly science policy and related news.</jats:p>

<jats:p>Controversial policy could entangle funding proposals in lengthy new ethical reviews.</jats:p>

<jats:p>Lawmakers propose reversing Supreme Court decisions.</jats:p>

<jats:p>THC levels in braziers show psychoactive marijuana use along ancient Silk Road.</jats:p>

<jats:p>Data from CYGNSS satellites could sharpen storm forecasts.</jats:p>

<jats:p>Spektr-RG, designed to study the effect of mysterious dark energy on galaxies, will be nation's only space observatory.</jats:p>

<jats:p>Two weeks of therapy delays disease for average of 2 years.</jats:p>