Author: Chelsea Gohd

A young cluster of galaxies sparkles under a cosmic glow that's 4.4 billion years old. This peek into the past shows the stellar spectacle of a galaxy cluster still forming.

What is it?

The James Webb Space Telescope snapped this image of the galaxy cluster MACS J0553.4-3342 on July 3 using its near-infrared camera (NIRCam). The glorious, glimmering sight is actually a massive young galaxy cluster forming 4.4 billion years ago. A galaxy cluster is a grouping of galaxies held together by gravity. Galaxy clusters can contain hundreds or even thousands of galaxies and are the largest known structures in the entire universe that are held together in this way.

Why is it incredible?

Because light takes time to travel through space, and because the JWST can look incredibly far out into space, this telescope acts as a sort time machine.

This power isn't unique to the JWST, however. Other telescopes like the Hubble Space Telescope, for instance, have similarly peered back in time through the cosmos and revealed some incredible, ancient sights. However, the JWST's specialized instruments like NIRCam allow the telescope to pick up incredibly faint light from galaxies remarkably far away. This greatly stretches how far back in time we can see.

But the really incredible thing is, you can look back in time yourself — with only your eyes. While JWST can look exceptionally far out into space and can capture the very faint light of ancient galaxies, the light coming from the stars you can see with your bare eyes also had to travel over incredible stretches of time to reach you. Think about this: the light coming from a constellation you love may have traveled across millions of light-years to get to your eyes.

A laser star guide beams up from the Gemini South Observatory and into the Milky Way on Cerro Pachón, a mountain in central Chile.

What is it?

The Gemini South Observatory, located in Chile, is one of two Gemini Observatories with the other located in Hawaii (named Gemini North, or 'Alopeke) on the volcano Mauna Kea.

Each Gemini Observatory has a 26.6-foot (8.1-meter) telescope. On the same mountain in Chile sits the 13.4-foot (4.1-meter) SOAR telescope.

In this photograph captured by Petr Horálek, an audiovisual ambassador for the U.S. national center for ground-based, nighttime optical astronomy at NOIRLab (the National Optical-Infrared Astronomy Research Laboratory), it looks like Gemini South is about to be beamed up into the night sky.

However, there isn't some alien ship behind that laser beam. Instead, Gemini South is beaming up a laser guide star, or a powerful laser that creates the appearance of a fake star in the night sky. This fake star acts as a reference point, helping the telescope to calibrate and correct any light distortions.

Why is it incredible?

Even from just this photograph, which shows an observatory in action, it's clear why this mountain is a hotspot for astronomical observing.

These peaks are chosen for many reasons, including their altitude and how far they are from bright lights that could affect observations. But even in a regular photograph, Horálek was able to show the incredible beauty of the glow of the Milky Way's heart above the mountain range, with every color in the rainbow popping up in the gas and dust across our galaxy.

Even the framing of the shot draws you in, as the viewer feels almost pulled down the road toward the observatory and right up into the Milky Way.

A space rock exploded through a bedroom ceiling in New Jersey, and scientists have now traced its origins to a strange, briny asteroid once visited by a NASA mission.

Two years ago on July 16, 2024 in the middle of the afternoon, a sonic boom shook New York City as a fireball streaked through the sky. The culprit? A rock the size of a heavy airline bag weighing roughly 110 pounds (50 kilograms). The meteorite hurtled over the east coast before crash-landing in a house in Hillsborough, New Jersey where the homeowner found it, reeking of sulfur. In studying this meteorite, scientists think that it could have come from the surface of an asteroid where liquid saltwater could have rested, possibly providing clues to life's origins on Earth.

"In a way, you can think of it as smelling the origins of life's atmosphere," lead author and meteor astronomer Peter Jenniskens of the SETI Institute and NASA’s Ames Research Center, told Space.com.

Despite its sulfuric stench, in a stroke of absolute luck, this meteorite crashed into the right house. After traveling through our atmosphere and heating up, searing through the sky and then crashing through a roof and then a bedroom ceiling, the meteorite broke apart into pieces. The homeowner not only sprung into action to collect these pieces of space rock into jars, they did so with gloves, protecting the rocks and keeping them remarkably well-preserved.

"He had the wherewithal to put on gloves and take out jars," Jenniskens said. "And for this type of meteorite, carbonaceous chondroits, it's very important because they just suck in every moisture you can think [of]." So if he would've handled the rocks with his bare hands, oils or moisture from his hands could have completely contaminated the rock, which is common in found meteorites. The homeowner also thought to call the American Meteor Society very quickly after recovering the rocks, making these samples unusually pristine.

Of course, some of the rocks were found to have some fiberglass and even carpet remnants on them after crashing through the roof of a house, Jenniskens said. But the integrity of the meteorites was still incredibly well-preserved for scientific investigation.

What did they find in these space rocks?

Once the rock fragments were collected, they were brought in for analysis led by co-author Mike Zolensky, a meteoriticist at NASA's Johnson Space Center. And they found the now-dubbed "Hillsborough meteorite" to be full of organic compounds created through chemical reactions with minerals also present in the rock as well as amino acids. They also found that some parts of the rocks were more altered by water than others.

They classified the meteorite as a CM1/2 carbonaceous chondrite, which are primitive meteorites that formed in the early solar system. CM2 meteorites typically come from parent asteroids that haven't been significantly altered by water while CM1 typically comes from asteroids with water. The Hillsborough meteorite doesn't fit neatly into either category, with some pieces of the rock altered by salty water.

This provided evidence that its parent asteroid must have had water, leading them to further classify this rock as a CM1/2, a category between 1 and 2. This is only the second meteorite of this type observed on Earth.

"Thanks to the homeowner’s quick reaction, these are the most pristine CM1/2 meteorites we know of," Jenniskens said in a statement.

They also found small, salty fragments inside the meteorite, leading the researchers to conclude that this rock may have come from a near-surface area of its parent asteroid, where liquid water evaporated and salt accumulated. A salty, briny asteroid.

This salty brine on the rock's parent asteroid could be an important piece to study, as researchers think that such a brine could ignite the chemical reactions between organic molecules and minerals that could create life. Some theories suggest that life on Earth began thanks to minerals and molecules deposited by crashing meteorites, and further study of such a well-preserved piece of a briny asteroid could help to put those pieces together.

And while the team doesn't know the full story behind the organic compounds and amino acids found in this rock, early analysis suggests that the amino acids present formed on the rock's parent asteroid with the help of chemical reactions in this briny environment.

Another major finding came from information from even before the crash. Thanks to reports from members of the public and footage from cameras (even doorbell cameras) across the eastern U.S., experts led by Jenniskens were able to piece together the trajectory of the object. Doppler weather radar at Newark Airport even helped to put the pieces together, detecting a long trail of pebbles stretching from Staten Island to New Jersey falling from the rock as it fell apart and out of the sky. This combined intel provided experts with the object's speed, and the direction from which it came.

In piecing together the rocks' trajectory, "we can say where they came from in the asteroid belt," Jenniskens said. "This one seemed to have come out of the inner asteroid belt."

In fact, he added that this meteorite's parent asteroid likely came from an area of the asteroid belt already observed in a flyby by NASA's Lucy mission, which is exploring the asteroids of the solar system. Could it be possible that Lucy observed the same bit of rock that ended up in a bedroom in New Jersey?

Jenniskens added that "If you hear about a meteorite fall in your area, please check your dash cams and video cameras and security ring [cameras], and even your cell phones." Who knows, you might have even accidentally captured footage that helps researchers to better understand a mysterious rock from space.

And if you live in the greater New York City area and want to get a closer look at this space rock, some of the meteorite fragments will be on display, curated at the American Museum of Natural History.

This work was described in a study published in the journal Science Advances.

Is space … sweet? As it turns out, interstellar space has sugar — and it's the same type of sugar that's found in raspberries (and self-tanners, surprisingly).

A sugar compound called erythrulose has been found near the center of our galaxy, swirling amongst the gas and dust like grains of sugar in a cotton candy machine. More specifically, this sugar was detected in a molecular cloud in the interstellar medium, or the space between star systems in a galaxy. And while we may not be able to use this sugar to make some kind of cosmic candy, scientists think that it could hold the clues to life's origins.

"The detection of erythrulose is very exciting because it opens up the possibility of discovering in space other sugars such as ribose, which is part of RNA, and other important molecules for the origin of life," Carlos Briones, co-author of the study, said in a statement.

Now, this isn't the first time sugar has been found in space. NASA's OSIRIS-REx mission visited the asteroid Bennu and returned samples of the space rock to Earth in 2023. An analysis of those samples revealed strange black grains of material that contained sugars, sugars have been detected in meteorite samples and a study from over 25 years ago even found sugar at the center of the Milky Way.

However, this is the first time sugar has been found in the interstellar medium, and it's also the first "true sugar" found in interstellar space. The difference is that while there have been some sugar-like compounds found in space, "true" sugars have a spine of at least three carbon atoms. Erythrulose has four.

"Our work shows that sugars can form naturally in space," lead author Izaskun Jiménez-Serra, an astronomer at the Center for Astrobiology in Madrid and the Spanish National Research Council, added in the statement.

This newly-spotted sugar is an exceptionally interesting find because erythrulose can change into the ingredients that create nucleic acids, and therefore life. Nucleic acids are essential to life as we know it, carrying information in cells — in fact, both DNA and RNA are types of nucleic acids.

Erythrulose could have "provided the feedstock for the first nucleic acids," Jiménez-Serra added. "That’s why the detection of erythrulose is so relevant for the origins of life."

In interstellar space, stars and planets are born in massive molecular clouds of dust and gas. If there is indeed sugar like erythrulose in these clouds, it could find its way onto asteroids and comets, or other small bodies that might crash into planets. If those objects were to crash into a young planet, that sugar could be left behind and go on to spark life.

In fact, some scientists think that life on Earth could've been sparked by asteroids delivering the materials for life via such collisions during an era where our planet was heavily bombarded by such objects around four billion years ago. Could those space rocks have held sugar from interstellar space and delivered it to Earth, supporting the earliest iterations of life as we know it?

This work was described in a study published July 13 in the journal Nature Astronomy.