Panta rhei is a simplified version of the famous greek philosopher Heraclitus' teachings. It basically means, everything flows. And everything in the Universe is indeed continually on the move, spiralling and shifting through space. Some cosmic objects move a little further than others — take the subject of this NASA/ESA Hubble Space Telescope image, a globular cluster of stars known as Palomar 12. Although it currently lies on the outskirts of the Milky Way’s halo, Palomar 12 was not born here. When astronomers first studied this cluster, they were puzzled by its strangely young age when compared to the other clusters in the galaxy. It appeared to be around 30% younger than other Milky Way globulars. Surely if it had been born within our galaxy, it would have sprung to life at a similar time to its cluster companions? A bit more digging revealed that Palomar 12 was actually ripped from its initial home, the Sagittarius Dwarf Elliptical galaxy, around 1.7 billion years ago via tidal interactions between its former home and our galaxy. The dwarf galaxy that Palomar 12 once called home is a satellite galaxy to ours, and closely orbits around us — even occasionally passing through the plane of our galaxy. In fact, it is being slowly torn apart and consumed by the Milky Way. The sparkling stars in this picture were imaged by Hubble’s Advanced Camera for Surveys.
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published during a waning gibbous moon.
12/01/2015

We’ve listed our can’t-be-missed articles in one place to help you stay on top of the most exciting news and discoveries from the final frontier.


2017

February

Journey To ALMA: The Eye In The Desert

It’s Possible That Small Satellites Will Save The World

What Mineral Evolution Tells Us About Life On Earth—And Beyond

Why Closing The Arecibo Observatory Is A Blow For Science And Imagination

Tanya Of Mars Gets Real About Rocks, Research, And Women In STEM

How Mars 2020 Became The Last Defense Of The Martian Past

SpaceX Slays While Fan Cries: “This Is What All Billionaires Should Do With Their Money.”

Boasting 7 Earth-Sized Planets, TRAPPIST-1 Is The New Solar System To Know

The Virtual Planetary Laboratory Knows It Takes A Village To Model A Planet

The Purpose Of The Telescopes Is To Give Us Back The Galaxy

Knowing How To Listen To The Stars Can Yield Insights About About Their Lives

Discover The Space Agencies You Didn’t Know Existed In This Interactive Infographic

Lunar Tourism Will Actually Be A Thing In 2018 Declares SpaceX

Wondering How Many Space Agencies Exist? There’s An Infographic For That.

How NASA Will Protect Europa’s Whales (Spoiler: It Involves A Self-Destruct Switch)


January:

We’re Looking Forward To These Space Missions In 2017

There Is No Such Thing As A Perfect Calendar

Are You Kidding Me, Rogue One?

How Prepared Are We For An Earth-Bound Asteroid?

Dean Little Wants To Help You Navigate The Red Planet

How A Small NASA Mission Might Change The Course Of Space Exploration

SpaceX’s Next Move Isn’t Rockets. It’s Internet Access.

The Last Man On The Moon Didn’t Want That Accolade

Sagan’s Hopes And Fears Have Never Been More Relevant Today

Astrobiologists Are Looking For Extraterrestrial Life In High Places

Could You Live In This Tiny Biosphere For 105 Days Like These Chinese Scientists Did?

A Look At How NASA Decides Where Next To Boldly Go With New Frontiers

We Visited ALMA, The Telescope That Can Hear The Big Bang


2016

December:

We Should Look For Alien Life Where Oceans Meets Ice

Some Astronauts’ Eyeballs Are Deformed After Spaceflight. Here’s Why.

NASA’s 2017 Spinoff Report Details Amazing Applications Of Space Technology

“The Beginning Of The End Of Our Historic Exploration Of Saturn”

Will Trump Deliver On Clinton’s Vow To Finally Open The X-Files?

Honoring John Glenn: Astronaut, Politician, And Inspiration To Us All

Could There Be Life On Our Neighbor, Proxima Centauri B?

Is There A Dream Of Chinese Spaceflight?


November:

8 Gorgeous Space Photos For Your Desktop

Why Artists Are The New Astronauts

Updating The History Of Our Solar System

I Took My 4 Kids To A Rocket Launch & They Loved It

3 Critical Life Lessons We Learned From Star Trek Captains

Trump To Earth Science: “You’re A Loser”

Why Analyzing DNA In Space Is A Big Deal

What Are Those Spooky Solar Eclipses, Anyway?

October:

New Horizons & SpaceX Remind Us How Space Motivates Young Minds

“Farewell Rosetta, You Have Done The Job”

Why You Should Visit Your State’s Space Exhibition

Interview With Sarah Hörst: Planet Doctor And Titan Evangelist

Our Dear Old Earth Has Love Handles

Why Chile’s Atacama Desert Is A Stargazer’s Paradise

Whether On This World Or Others, Our Species Will Someday Perish

Can You Do Yoga In Space?

Eyes On The Skies At Owens Valley Radio Observatory

Did We Create Our Weather, Or Did It Create Us?


September:

What We Talk About When We Talk About Space

Pics: A Stunning View Through Mt. Wilson’s 60-Inch Telescope

Delete Your Orbit: KIC 8462852 AKA The “Most Mysterious Star in Our Galaxy”

This Unique Radiation Remains a Major Obstacle To Long-Term Spaceflight

Watch Out, Mars: City Planners Are Coming For You

5 Saturn Quirks That Cassini Unveiled

DYO: Gliese 581 — the Most Misleading Craigslist Housing Ad in the Milky Way

His Moment Cultivated, Musk Takes the Stage

What’s The Biggest Rocket You Could Build?

Musk Unveils SpaceX’s Mars Architecture


AUGUST:

My Kids Became Martian Spelunkers Thanks To NASA

What’s Causing Earth’s Temperature To Soar?

The Incredible Legacy Of Sample Return Missions

Delete Your Orbit: Ceres’ Discarded Hopes And Dismantled Dreams

Part Of Your Suntan Is Intergalactic

The Sun’s Rain Is Terrifying

Looking For Life In All The Right Places

Delete Your Orbit: How Celebrity Culture Can Explain Our Galaxy’s Supermassive Diva

Pics: Historic Falcon 9 Booster Now Stands Proud At SpaceX HQ

JULY:

We Need To Do A Better Job Of Imagining Aliens

Here’s One Way We Might Be Able To Hack Interstellar Travel

The Perchlorate Factor: Will Insidious Chemicals Slow Elon Musk’s Mars Plans?

How Dirty Is A Rocket Launch?

Marschitect Vera Mulyani Dreams Of Cities On Mars

In New Space Race, Rapid Testing Sets SpaceX Apart

A Jupiter Retrospective: From Pioneer To Juno

The Final Countdown: Dr. Jared Espley On Juno’s Epic Journey To Jupiter

Juno’s Make-Or-Break Moment


JUNE:

For My Teen Daughter, Scientists Are The Real Rock Stars

The Many Mysteries Of Dwarf Galaxies

FYI: Space Shuttles Are Still Very Much A Thing

A Mission To Neptune’s Moon Triton Would Be Pretty Cool

Space Travel Can Feel Like A Bad Hangover

Designing The Perfect Escape From A Failing Rocket

Space: The Final Frontier Of Inequality?

Radio Waves Hint At Drama Deep Below The Clouds Of Jupiter

You ♥ Space – Bernard Kutter

We Are Living Carl Sagan’s Dream For Space Exploration


MAY:

Here’s Why We Might Still Want To Return To The Moon

Going To Mars Is No Longer The Stuff Of Science Fiction

One Small Step For Designers, One Giant Leap For Fashion

What Was The Moon Like Before It Became A Boring Hunk Of Rock?

Science Conferences Are Our Mother-Daughter Thing

The Strange Connection Between Einstein, Time, And Linguistics

Kepler Discovers Over a Thousand New Planets

We Love Space Exploration, But Mostly in our Dreams

There Are Big Things Hiding in the Big Dipper


APRIL:

Will We Ever Get to See an Exoplanet Outside Our Own Solar System?

China Preps to Plunk a Rover on Mars By 2020

When You Find Actual Stardust Buried in the Ocean Floor

6 Apps For Your Inner Space Hitchhiker

11 Ways to Help Scientists Do Science Right Now

Oceans Are Much More Common in the Solar System Than You Think

Sorry, Neil. SpaceX Is Already Leading the Space Frontier.

Ancient Trees and Modern Telescopes Hint at Our Sun’s Hidden Power

How We Name All the Stuff in the Universe


MARCH:

We’re All Lunatics Here: 120 Attempts to Go to the Moon

All We Want Is Someone Else to Talk to in This Universe

Astronaut’s Pics of Sunrises Give Us All the Feels

How Will We Deal With the Psychological Problems of Spaceflight?

Is Mars Too Dry to Harbor Life?

Planet Earth’s Incredible, Shrinking Habitable Zone

How Many Times Have We Visited Mars?

They Let Me Into NASA’s Secretive Jet Propulsion Laboratory

8 Things We Learned from Scott Kelly’s Year in Space

Brown Dwarfs: The Middle Children of Space Objects


FEBRUARY:

It’s Going to be Really Hard to Have Kids in Space

Why We Should Never Nuke Mars

Will We Bring Mosquitoes to Mars?

Earth Scores a B In Potential Habitability—And That’s a Good Thing!

Mike Siebert Has the Coolest Job Ever


JANUARY:

Watching the Wanderers

NASA Honors its Fallen Heroes

What Space Exploration Does To The Human Body


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