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Category: space – Page 2

KIC 5623923 is a faint eclipsing binary exhibiting Delta Scuti-type pulsations, observations find

Using NASA’s Kepler space telescope, Chinese astronomers have observed a binary star system known as KIC 5623923. As a result, they found that the investigated system is a faint eclipsing binary experiencing Delta Scuti-type pulsations. The new findings were published Nov. 24 on the arXiv pre-print server.

Delta Scuti stars are pulsating variables with spectral types between A and F, named after the Delta Scuti variable in the constellation Scutum. They exhibit radial and non-radial pulsations spanning periods from 20 minutes to eight hours. Studying pulsation behavior of Delta Scuti variables could help us advance our knowledge about stellar interiors.

Second Variety (FULL audiobook) by Philip K. Dick

Second Variety audiobook.
by Philip K. Dick (1928 — 1982)

First published in Space Science Fiction May 1953. “The claws were bad enough in the first place—nasty, crawling little death-robots. But when they began to imitate their creators, it was time for the human race to make peace—if it could!” When future war becomes so horrific that humans turn to machines and computers to design ways to kill each other strange things may happen. And do in this classic Philip K. Dick story!(summary from the story blurb and Phil Chenevert)

Bridging the gap between molecules and materials in quantum chemistry with localized active spaces

Emerging materials between molecules and materials demand new modeling approaches. Here, the authors present a localized active space approach that enables accurate and efficient band structure calculations to capture long-range charge and energy transfer in correlated materials.

Perseverance Finds Tropical-Style Clays on Mars

Dr. Briony Horgan: “You need so much water that we think these could be evidence of an ancient warmer and wetter climate where there was rain falling for millions of years.”

What was Mars like billions of years ago? This is what a recent study published in Communications Earth & Environment hopes to address as an international team of scientists investigated intriguing evidence from the surface of Mars that could indicate heavy water activity existed long ago. This study has the potential to help scientists better understand ancient conditions on Mars and whether they were favorable for supporting life as we know it.

For the study, the researchers examined aluminum-rich rock fragments that were discovered by NASA’s Perseverance rover within Jezero Crater on Mars, and specifically the processes how they formed. This is because aluminum-rich clay minerals on Earth often form from heavy rainfall or other water-driven activities. Using the rover’s SuperCam and Mastcam-Z instruments, the researchers discovered the fragments—which were composed of aluminum and titanium with depleted traces of iron and magnesium—likely were analogs for heavy rainfall on Earth under greenhouse conditions. Therefore, the researchers concluded they potentially formed under intense wet conditions on Mars.

NASA Satellite Captures First-Ever High-Res View of a Giant Pacific Tsunami

A rare satellite view captured a major Pacific tsunami in unprecedented detail, revealing wave behaviors scientists did not expect. A satellite designed to track the height of the ocean’s surface proved its capabilities when a powerful earthquake struck off the Kamchatka Peninsula in late July, s

Evidence of rain-driven climate on Mars found in bleached rocks scattered in Jezero crater

Rocks that stood out as light-colored dots on the reddish-orange surface of Mars now are the latest evidence that areas of the small planet may have once supported wet oases with humid climates and heavy rainfall comparable to tropical climates on Earth.

The rocks discovered by NASA’s Perseverance Mars rover are white, aluminum-rich kaolinite clay, which forms on Earth after rocks and sediment are leached of all other minerals by millions of years of a wet, rainy climate.

These findings were published Monday (Dec. 1) in the journal Communications Earth & Environment by lead author Adrian Broz, a Purdue University postdoctoral research associate in the lab of Briony Horgan, a long-term planner on NASA’s Mars Perseverance rover mission and professor of planetary science in the Department of Earth, Atmospheric, and Planetary Sciences in Purdue’s College of Science.

Bipolar planetary nebula reveals rare open cluster association

By analyzing the data from the SuperCOSMOS Hα Survey (SHS) and from the Gaia satellite, astronomers have inspected a bipolar planetary nebula designated PHR J1724-3859. Results of the study, published Nov. 19 on the arXiv pre-print server, deliver crucial insights into the properties of this nebula.

Planetary nebulae (PNe) are the final stages of evolution of low-to-intermediate mass stars. They are expanding shells of gas and dust that have been ejected from a star during the process of its evolution from a main sequence star into a red giant or white dwarf. PNe are relatively rare, but important for astronomers studying the chemical evolution of stars and galaxies.

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