Mars the rusty planet.
2023 July 1
Three Galaxies in Draco Image Credit & Copyright: David Vernet , Jean-François Bax , Serge Brunier, OCA/C2PU
Explanation: This tantalizing trio of galaxies sometimes called the Draco Group, is located in the northern constellation of (you guessed it) Draco, the Dragon. From left to right are face-on spiral NGC 5985, elliptical galaxy NGC 5982, and edge-on spiral NGC 5981, all found within this single telescopic field of view that spans a little more than the width of the full moon. While the group is far too small to be a galaxy cluster, and has not been catalogued as a compact galaxy group, the three galaxies all do lie roughly 100 million light-years from planet Earth. Not as well known as other tight groupings of galaxies, the contrast in visual appearance still makes this triplet an attractive subject for astroimagers. On close examination with spectrographs, the bright core of striking spiral NGC 5985 shows prominent emission in specific wavelengths of light, prompting astronomers to classify it as a Seyfert, a type of active galaxy. This impressively deep exposure hints at a faint dim halo along with sharp-edged shells surrounding elliptical NGC 5982, evidence of past galactic mergers. It also reveals many even more distant background galaxies.
∞ Source: apod.nasa.gov/apod/ap230701.html
Tumblr reminds me that, earth is so beautiful! Live and see the beauty before leaving ♡
Metal corrosion seriously affects the service life of marine steel structures. The traditional cathodic protection needs great consumption of energy and metal resources. Therefore, it’s imperative to develop green and cost-effective energy sources for corrosion protection.
Recently, a research team led by Prof. Wang Xiutong from the Institute of Oceanology of the Chinese Academy of Sciences (IOCAS) focused on triboelectric nanogenerators (TENGs) as a new energy conversion system, and designed melamine foam (MF) /MXene/Ecoflex@TiO2-TENG (FME@TiO2-TENG) for green electrochemical corrosion protection.
The study was published in Nano Energy on March 13.
The researchers explored the effects of MXene and TiO2 nanotubes on the charge transfer mechanism of the friction layer. They found that the conductive properties and strong electronegativity of MXene played a positive role in the charge transfer of Ecoflex. At the same time, TiO2 nanotubes could capture the image charge. The combined action of the above two points improved the electrical output performance of TENG, which is conducive to the formation of better cathodic protection effect.
Source: phys.org
via NASA https://ift.tt/WqrYHOz
To see the feathered serpent descend the Mayan pyramid requires exquisite timing. You must visit El Castillo – in Mexico’s Yucatán Peninsula – near an equinox. Then, during the late afternoon if the sky is clear, the pyramid’s own shadows create triangles that merge into the famous illusion of a slithering viper. Also known as the Temple of Kukulkan, the impressive step-pyramid stands 30 meters tall and 55 meters wide at the base. Built up as a series of square terraces by the pre-Columbian civilization between the 9th and 12th century, the structure can be used as a calendar and is noted for astronomical alignments. The featured composite image was captured in 2019 with Jupiter and Saturn straddling the diagonal central band of our Milky Way galaxy. Tomorrow marks another equinox – not only at Temple of Kukulcán, but all over planet Earth.