Sound Can Be Used To Print Droplets That Couldn't Be Printed Before

“Star Clusters M35 and NGC 2158 ” Is the NASA Astronomy Picture of the Day of today, May 10, 2021

This is NOT Abstract Art!

This is what you get when you pass the visible sun’s light through a prism-like device. ( called as Spectral Absorption Lines ). We all know what would happen right? Newton is accorded for this discovery. It ‘disassembles’ into its constituent colors (VIBGYOR). 

This statement is not entirely true per se because as you can deduce from the picture, some of the colors are missing! 

But why?

The dark patches in the above spectrum arise from gas at or above the Sun’s surface absorbing sunlight emitted below. Since different types of gas absorb different colors of light, it is possible to determine what gasses compose the Sun.

Albeit that is true, It is still not known why the Sun’s light is missing some colors! The majority of the spectral absorption lines have been identified but not all.

The Extraordinary Core of a Neutron Star

Lucy Reading-Ikkanda/Quanta Magazine; Source: Feryal Özel

The Japanese Space Agency JAXA successfully touched down to retrieve a sample of the asteroid Ryugu after blasting a crater in it. Love how the rubble rises in the thin gravity

Two of Saturn’s Moons Standing in Sharp Contrast Against Their Giant Companion

via reddit

My image of the Horsehead and Flame Nebula, created using over 24 hours worth of exposure

A galaxy on the edge

This spectacular image was captured by the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys (ACS). The bright streak slicing across the frame is an edge-on view of galaxy NGC 4762, and a number of other distant galaxies can be seen scattered in the background.

NGC 4762 lies about 58 million light-years away in the constellation of Virgo (The Virgin). It is part of the Virgo Cluster, hence its alternative designation of VCC 2095 for Virgo Cluster Catalogue entry. This catalogue is a listing of just over 2000 galaxies in the area of the Virgo Cluster. The Virgo Cluster is actually prominently situated, and lies at the centre of the larger Virgo supercluster, of which our galaxy group, the Local Group, is a member.

Previously thought to be a barred spiral galaxy, NGC 4762 has since been found to be a lenticular galaxy, a kind of intermediate step between an elliptical and a spiral. The edge-on view that we have of this particular galaxy makes it difficult to determine its true shape, but astronomers have found the galaxy to consist of four main components — a central bulge, a bar, a thick disc and an outer ring.

The galaxy’s disc is asymmetric and warped, which could potentially be explained by NGC 4762 violently cannibalising a smaller galaxy in the past. The remains of this former companion may then have settled within NGC 4762’s disc, redistributing the gas and stars and so changing the disc’s morphology.

NGC 4762 also contains a Liner-type Active Galactic Nucleus, a highly energetic central region. This nucleus is detectable due to its particular spectral line emission, which acts as a type of “atomic fingerprint”, allowing astronomers to measure the composition of the region.

Image credit: ESA/Hubble & NASA

Magnets are awesome and this ingenious Norwegian playset called Magination makes manipulating magnets look like magic.

“Magination started with a fascination for magnets and a joy of playing with them. We originally wanted to make one specific game, but soon realized that Magination could be used to play a variety of different games - much like a deck of cards. Submit new games, rules and ideas in our online community, and be a part of the continuous development of the game.”

Click here for ordering info. Watch this video to get a better look at Magination in action:

[via Geekologie]

Spiral Galaxy NGC 1512: The Inner Ring

    Most galaxies don’t have any rings – why does this galaxy have two? To begin, the bright band near NGC 1512’s center is a nuclear ring, a ring that surrounds the galaxy center and glows brightly with recently formed stars.

Most stars and accompanying gas and dust, however, orbit the galactic center in a ring much further out – here seen near the image edge. This ring is called, counter-intuitively, the inner ring. If you look closely, you will see this the inner ring connects ends of a diffuse central bar that runs horizontally across the galaxy.

These ring structures are thought to be caused by NGC 1512’s own asymmetries in a drawn-out process called secular evolution. The gravity of these galaxy asymmetries, including the bar of stars, cause gas and dust to fall from the inner ring to the nuclear ring, enhancing this ring’s rate of star formation. Some spiral galaxies also have a third ring – an outer ring that circles the galaxy even further out.  ~ APOD

Credit: NASA, ESA, Hubble Space Telescope

'We've now seen the unseeable': Black hole photographed for the first time

Black holes have been mysterious and elusive — until now. Astronomers using the Event Horizon Telescope (EHT) have, for the first time, photographed one.

Black holes have been mysterious and elusive — until now. Astronomers using the Event Horizon Telescope (EHT) have, for the first time, photographed one.

“We’ve now seen the unseeable,” said Avery Broderick, a physicist at the University of Waterloo and the Perimeter Institute who was part of the international EHT research team. “Black holes are made real — they’re not just the scribblings on theorists’ chalkboards anymore, but they really are out there in the night.”

The image, which shows an orange ring around a round, black silhouette, is of the black hole at the centre of Messier 87 (M87), a galaxy 50 million light-years from Earth. This black hole is one of the most massive known: it’s six billion times more massive than our sun.

Black holes are so dense and have such strong gravity that anything that crosses their threshold — known as the event horizon — gets pulled into them, never to return. That includes both matter and light, making them black and invisible — and therefore very difficult to see and photograph.

An international team of more than 200 people spent more than a decade working to capture the image released today.

Continue Reading.