Tag: 风景名胜

Study Galactic Gardening Can Relieve Stress in Space

first_img In space, no one can hear you stress.As we prepare for the future of galactic travel, researchers are looking into ways to help astronauts cope with the anxieties of space missions.A new study from the University of Florida suggests the psychological benefits of gardening.Master’s student Raymond Odeh and horticulture professor Charles Guy determined that plant-human interactions can provide astronauts the same serenity they do on Earth.The pair make a case for “plant-mediated” therapies, which they said may balance out behavioral health, cognitive performance, and overall physical health during long-distance trips.Astronauts spend months floating through a hostile environment, isolated and confined, unable to step outside for a breath of fresh air. Cut off from family, friends, and Netflix, the brave men and women of international space programs endure endless physical and emotional challenges.I tend toward Barry Manilow and a bar of chocolate to ease my anxieties. But not everyone can drown their sorrows at the Copacabana.Instead, they can develop a green thumb.Interactions with plants “provide essential benefits to the health, well-being, and longevity of people, wherever they may live,” according to the study, published Oct. 2 in the journal Open Agriculture.Odeh and Guy drive their theory home with anecdotes from astronauts who experienced the psychological impact of growing plants in space.“It was surprising to me how great [six] soybean plants looked,” Peggy Whitson wrote in an email, describing her reaction to an agricultural experiment aboard the ISS in 2002.“I guess seeing something green for the first time in a month and a half had a real effect,” she continued. “From a psychological perspective, I think it’s interesting that the reaction was as dramatic as it was.“Guess if we go to Mars, we need a garden,” Whitson added.What applies to humans on Earth also applies to humans in space: Gardening is a fruitful (no pun intended) stress reliever that will no doubt follow people as we venture further from this planet.Let us know what you like about Geek by taking our survey. Stay on target NASA Says 2 Asteroids Will Safely Fly By Earth This WeekendHubble Captures Saturn’s ‘Phonograph Record’ Ring System last_img read more

Universes Densest Galaxy Cluster Discovered

An international team of scientists has located one of the densest clusters of galaxies in the universe.The team, led by Mauro Sereno of the University of Bologna, used gravitational lensing to probe galaxy cluster PSZ2 G099.86+58.45.Described by Sereno as “the best candidate to target,” PSZ2 lies at the center of a very large field, allowing the lensing signal to reach a large radii. The “gravitational lens” effect, affording to the Instituto de Astrofísica de Canarias (IAC), happens when the mass of a cluster and its surroundings bend light from very distant galaxies and change their shape.“This study shows that the density of matter around the cluster we studied is up to six times greater than expected,” Sereno said in a statement.While it took “just a few minutes” to measure, the group spent weeks determining whether this was a fluke.“Astronomers can be very [critical] and they are mostly [critical] toward their own work,” the researcher wrote in a blog post. “Or at least, they should be. Or at the very least, I am.”Using X-ray emission, cosmology, numerical simulations, and optical spectroscopy, Sereno & Co. checked for every possible systematic error. But the signal proved true, and the team successfully revealed one of the highest-density nodes of the cosmic web.Six years in the making, their results were published recently in the journal Nature Astronomy.“Astronomy can be a lot of fun, you can be really free to make your mind wonder,” Sereno said. “Astronomy is sharing, too. Our work was mostly based on public archives, provided by people who make their work available to the whole community.”There is, as always, more work to be done. But, as IAC researcher Antonio Ferragamo pointed out, this marks “another small step forward,” toward understanding dark matter and how it is distributed across the cosmic web of the universe.“The research I enjoy the most comes from unannounced ideas,” Sereno said. “Most of the time, that genius idea you had is just a reminder that you should go to bed earlier, but sometimes you find something.”Let us know what you like about Geek by taking our survey. Supercomputer Generates Virtual Universes to Study Galaxy FormationNASA’s Spitzer Telescope Spots Whirlpool ‘Warhol’ Galaxy Stay on target read more