The Great Conjunction: Jupiter And Saturn 🌌.

Faint starlight in Hubble images reveals distribution of dark matter

Astronomers using data from the NASA/ESA Hubble Space Telescope have employed a revolutionary method to detect dark matter in galaxy clusters. The method allows astronomers to “see” the distribution of dark matter more accurately than any other method used to date and it could possibly be used to explore the ultimate nature of dark matter. The results were published in the journal Monthly Notices of the Royal Astronomical Society.

In recent decades astronomers have tried to understand the true nature of the mysterious substance that makes up most of the matter in the Universe – dark matter – and to map its distribution in the Universe. Now two astronomers from Australia and Spain have used data from the Frontier Fields programme of the NASA/ESA Hubble Space Telescope to accurately study the distribution of dark matter.

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NASA’s Webb Space Telescope Reveals Astounding, Unprecedented Views of the Universe

This first image from NASA’s James Webb Space Telescope is the deepest and sharpest infrared image of the distant universe to date. Known as Webb’s First Deep Field, this image of galaxy cluster SMACS 0723 is overflowing with detail. Thousands of galaxies – including the faintest objects ever observed in the infrared – have appeared in Webb’s view for the first time. This slice of the vast universe covers a patch of sky approximately the size of a grain of sand held at arm’s length by someone on the ground.

seeing the photos from Webb up against photos from Hubble just makes me… I don’t even know like, wow! Look at that!

Could invisible aliens really exist among us? An astrobiologist explains

by Samantha Rolfe

They probably won’t look anything like this. Martina Badini/Shutterstock

Life is pretty easy to recognise. It moves, it grows, it eats, it excretes, it reproduces. Simple. In biology, researchers often use the acronym “MRSGREN” to describe it. It stands for movement, respiration, sensitivity, growth, reproduction, excretion and nutrition.

But Helen Sharman, Britain’s first astronaut and a chemist at Imperial College London, recently said that alien lifeforms that are impossible to spot may be living among us. How could that be possible?

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Washington State University Physicists create 'negative mass'

Washington State University physicists have created a fluid with negative mass, which is exactly what it sounds like. Push it, and unlike every physical object in the world we know, it doesn’t accelerate in the direction it was pushed. It accelerates backwards.

The phenomenon is rarely created in laboratory conditions and can be used to explore some of the more challenging concepts of the cosmos, said Michael Forbes, a WSU assistant professor of physics and astronomy and an affiliate assistant professor at the University of Washington. The research appears today in the journal Physical Review Letters, where it is featured as an “Editor’s Suggestion.”

Hypothetically, matter can have negative mass in the same sense that an electric charge can be either negative or positive. People rarely think in these terms, and our everyday world sees only the positive aspects of Isaac Newton’s Second Law of Motion, in which a force is equal to the mass of an object times its acceleration, or F=ma. In other words, if you push an object, it will accelerate in the direction you’re pushing it. Mass will accelerate in the direction of the force.

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Your fave is problematic: Neutron Stars

Neutron stars are probably one of the weirdest type of objects to exist in the universe… but first let me explain what a neutron star is

when a star with the mass of 8-20 times of the sun dies (and by dies I mean fucking explodes), the core collapses to form a neutron star

they are incredibly dense, spin rapidly and have very strong magnetic fields

sounds all fun and games, right? sounds normal? well listen up

So, we know that electrons usually refuse to be squeezed together. but in a death event of a big star, the pressure is so extreme that protons and electrons get violently SMASHED together and form neutrons. 

sounds like someone needs to take an anti-agression class if you ask me

Now, what once was a star more massive than the Sun, is condensed to a tiny ball (usually about 10-20km!) of neutrons, with all of the mass in this tiny ball. 

To visualize, imagine the mass of the Sun (300 000X the mass of the Earth), in a little 20km sphere, the size of a small city.

To visualize the density of a neutron star, think of the classic model of the atom. if an atom was a sports field 100m across, it would be mostly empty. almost all of the atom’s mass sits in the core, in this example, the core is the size of a marble.

but in a neutron star, this doesn’t apply anymore. in a neutron star, the entire stadium would be filled to the brim with neutrons. ALL. OF. IT.

a single cubic centimetre of Neutronium has the mass of 400 million tons. that’s the total mass of every single car and truck in the US.

the typical gravity of a neutron star is about 100 million times of that of the Earth. clingy as shit

so far, we have detected over 1000 of these weird fucks in our galaxy alone. yikes

some Neutron stars are vampires. They can be in a binary star system where a normal star orbits them and they feed of that material

summary: extremely weird and violent space ball of rage, tiny, filled to the top with anger, sometimes a vampire

Hubble fortuitously discovers a new galaxy in the cosmic neighborhood

Astronomers using the NASA/ESA Hubble Space Telescope to study some of the oldest and faintest stars in the globular cluster NGC 6752 have made an unexpected finding. They discovered a dwarf galaxy in our cosmic backyard, only 30 million light-years away. The finding is reported in the journal Monthly Notices of the Royal Astronomical Society: Letters.

An international team of astronomers recently used the NASA/ESA Hubble Space Telescope to study white dwarf stars within the globular cluster NGC 6752. The aim of their observations was to use these stars to measure the age of the globular cluster, but in the process they made an unexpected discovery.

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Extinct tree grows anew from ancient jar of seeds unearthed by archaeologists

by Stephen Messenger

“For thousands of years, Judean date palm trees were one of the most recognizable and welcome sights for people living in the Middle East — widely cultivated throughout the region for their sweet fruit, and for the cool shade they offered from the blazing desert sun.

From its founding some 3,000 years ago, to the dawn of the Common Era, the trees became a staple crop in the Kingdom of Judea, even garnering several shout-outs in the Old Testament. Judean palm trees would come to serve as one of the kingdom’s chief symbols of good fortune; King David named his daughter, Tamar, after the plant’s name in Hebrew.

By the time the Roman Empire sought to usurp control of the kingdom in 70 AD, broad forests of these trees flourished as a staple crop to the Judean economy — a fact that made them a prime resource for the invading army to destroy. Sadly, around the year 500 AD, the once plentiful palm had been completely wiped out, driven to extinction for the sake of conquest.

In the centuries that followed, first-hand knowledge of the tree slipped from memory to legend. Up until recently, that is.

During excavations at the site of Herod the Great’s palace in Israel in the early 1960’s, archeologists unearthed a small stockpile of seeds stowed in a clay jar dating back 2,000 years. For the next four decades, the ancient seeds were kept in a drawer at Tel Aviv’s Bar-Ilan University. But then, in 2005, botanical researcher Elaine Solowey decided to plant one and see what, if anything, would sprout.

“I assumed the food in the seed would be no good after all that time. How could it be?“ said Solowey. She was soon proven wrong.

Amazingly, the multi-millennial seed did indeed sprout — producing a sapling no one had seen in centuries, becoming the oldest known tree seed to germinate.

Today, the living archeological treasure continues to grow and thrive; In 2011, it even produced its first flower — a heartening sign that the ancient survivor was eager to reproduce. It has been proposed that the tree be cross-bred with closely related palm types, but it would likely take years for it to begin producing any of its famed fruits. Meanwhile, Solowey is working to revive other age-old trees from their long dormancy.”

***Does anyone in the know have any comments?

(Source: Tree Hugger)