Universe Today

January 10, 2022January 10, 2022 by Matt Williams

What is the Arecibo Message?

A team of astronomers from UCLA searched for "technosignatures" in the Kepler field data. Credit and Copyright: Danielle Futselaar

On November 16th, 1974, a coded radio message was broadcast from the Arecibo Observatory in Puerto Rico. The message contained information on mathematics, humanity, the Solar System, DNA, and the Observatory itself. The destination for this message was Messier 13 (NGC 6205 or “The Great Hercules Cluster”), a globular star cluster located about 25,000 light-years from Earth in the constellation of Hercules.

This historic signal was the Arecibo Message, humanity’s first attempt at Messaging Extraterrestrial Intelligence (METI). Almost fifty years later, the Message remains a focal point in the Search for Extraterrestrial Intelligence (SETI), the ethics of messaging, and why we haven’t heard from any extraterrestrial civilization (the Fermi Paradox). What’s more, a growing movement today would like to see more METI efforts mounted in the future.

January 10, 2022January 10, 2022 by Evan Gough

The Early Earth was Really Horrible for Life

The Blue Marble image of Earth from Apollo 17. Credit: NASA

Earth has had a long and complex history since its formation roughly 4.5 billion years ago. Initially, it was a molten ball, but eventually, it cooled and became differentiated. The Moon formed from a collision between Earth and a protoplanet named Theia (probably), the oceans formed, and at some point in time, about 4 billion years ago, simple life appeared.

Those are the broad strokes, and scientists have worked hard to fill in a detailed timeline of Earth’s history. But there are a host of significant and poorly-understood periods in the timeline, lined up like targets for the scientific method. One of them concerns UV radiation and its effects on early life.

A new study probes the effects of UV radiation on Earth’s early life-forms and how it might have shaped our world.

January 10, 2022January 10, 2022 by Nancy Atkinson

SpaceX Tests its Starship-Catching Launch Tower

Screenshot of the Mechazilla launch tower at Boca Chica, via a video shared by Elon Musk.

If you thought landing a used rocket booster on a barge or a landing pad was crazy idea, take a look at how SpaceX plans to land the big Starship rocket.

The same tower that will be used to launch the rocket will also attempt “catching” the spent booster when it comes back to Earth.

January 9, 2022January 9, 2022 by Scott Alan Johnston

Now we Know why Spaceflight Affects Your Eyes

70% of astronauts who spend time on the International Space Station (ISS) experience swelling at the back of their eyes, causing blurriness and impaired eyesight both in space and when they return to Earth. Sometimes, it’s permanent. Understanding the way microgravity affects the eyes, and the human body as a whole is an essential part of preparations for future long-duration spaceflights to the Moon and Mars. In an effort to understand the cause of these eye problems, researchers at the Medical University of South Carolina used MRI scans of twelve ISS astronauts to measure the intracranial venous system (veins that circulate blood to the brain) before and after flight. They’ve determined that there is a strong connection between the swelling of these veins and the onset of eye trouble.

January 8, 2022January 8, 2022 by Matt Williams

The Surface of the Moon is Electrically Charged, Which Could Allow a Hovering Robot to Explore it

Let’s not sugarcoat it. Exploring the Moon is not for the faint of heart! It’s an airless body, which means there is no atmosphere, the surface temperatures are extreme, and there’s lots of radiation. The low gravity also means you can never really walk on the surface and have to bounce around in a bulky spacesuit until you fall over. And you can bet your bottom dollar people will make a supercut of the footage someday (see below). Then there’s that awful moondust (aka. lunar regolith), which is electrostatically charged and sticks to EVERYTHING!

Looking to take advantage of this, researchers from the Massachusetts Institute of Technology (MIT) began testing a new concept for a hovering rover that harnesses the Moon’s natural charge to levitate across the surface. On the Moon, this surface charge is strong enough to levitate moon dust more than 1 meter (3.3 ft) above the surface. With support from NASA, this research could lead to a new type of robotic exploration vehicle that will help astronauts explore the Moon in the coming years.

January 8, 2022January 8, 2022 by Nancy Atkinson

Webb’s Mirror Now Fully Unfolded. Prepare to Witness the Power of This Unprecedented Space Telescope

The James Webb Space Telescope primary mirror is now fully unfolded, which successfully completes the mission’s major deployments. The starboard side of the primary mirror was released into place today, completing a two-week long, complex deployment sequence. The mirror of the most powerful space telescope ever built is now open, preparing to “unfold the Universe.”

January 7, 2022January 7, 2022 by Evan Gough

Astronomers Discover a Totally New Kind of Nebula

Discovery image of the nebula. For this image, 120 individual exposures had to be combined to obtain a total exposure time of 20 hours. The images were taken over several months from Brazil. Image Credit: Maicon Germiniani

Most Universe Today readers are familiar with nebulae. They’re gaseous structures lit up with radiation from nearby stars, and they’re some of nature’s most beautiful forms.

With the help of amateur astronomers who laid the groundwork, an international team of astronomers have discovered a new type of nebulae around binary stars that they’re calling galactic emission nebulae.

January 7, 2022January 7, 2022 by Evan Gough

A New Image Reveals Orion’s Flame Nebula in Infrared

Do not let the image and the name of the depicted cosmic object fool you! What you see in this picture is not a wildfire, but the Flame Nebula and its surroundings captured in radio waves. The Flame Nebula is the large feature on the left half of the central, yellow rectangle. The smaller feature on the right is the reflection nebula NGC 2023. To the top right of NGC 2023, the iconic Horsehead Nebula seems to emerge heroically from the “flames”. The three objects are part of the Orion cloud, a giant gas structure located between 1300 and 1600 light-years away. The different colours indicate the velocity of the gas. The Flame Nebula and its surroundings are moving away from us, with the red clouds in the background receding faster than the yellow ones in the foreground. The image in the rectangle is based on observations conducted with the SuperCam instrument on the ESO-operated Atacama Pathfinder Experiment (APEX) on Chile’s Chajnantor Plateau. The background image was taken in infrared light with ESO’s Visible and Infrared Survey Telescope for Astronomy (VISTA) at the Paranal Observatory in Chile.

The ESO has released some stunning new images of Orion’s Flame Nebula. They’re from a few years ago but are newly processed as part of the Orion cloud complex study. The images have led to discoveries in the often-observed Orion cloud complex.

January 7, 2022January 7, 2022 by Nancy Atkinson

China’s Rover Checks out that Weird Cube on the Moon. Surprise! It’s a Rock.

The view of the mystery rock on the edge of the crater from a short distance, as seen by the Yutu lunar rover. Credit: CNSA.

Back in early December 2021, China’s Yutu 2 rover made headlines when it spied what looked like a curious cube-shaped object on the Moon’s surface. Of course, speculations ran rampant. And it didn’t help matters any when the China National Space Administration (CNSA) nicknamed the object the “mystery hut.”

An update today from Yutu’s cameras reveals the true nature of this object. Yup, it’s just a rock. And not very cube-shaped, either.

January 7, 2022January 7, 2022 by Nancy Atkinson

Here’s Why Webb Doesn’t Have Cameras on Board to Livestream its Deployment

Illustration of NASA's James Webb Space Telescope. Credits: NASA

As the James Webb Space Telescope unfolds and makes its way to its final destination in space, NASA and ESA have done a great job of sharing the experience with the public. With webcasts, livestreams and a very active social media presence, the JWST team has allowed people to watch over the shoulders of engineers and scientists, as well as ask questions about the process of commissioning the new telescope.

The most often asked question on social media and at several press conferences seems to be, why weren’t cameras put on JWST to provide actual live footage from the telescope? Wouldn’t seeing it firsthand be better than just receiving telemetry?