Universe Today

July 19, 2021July 19, 2021 by Matt Williams

Good News! NASA Announces that they have Fixed Hubble!

Will China's new space telescope out-perform the Hubble? Image: — The Hubble Space Telescope. Image: NASA

Update: Hubble took its first picture since it went into safe mode on June 13th! More info here.

On Sunday, June 13^th, the Hubble Space Telescope gave the astronomical community a fright when its payload computer suddenly stopped working. This prompted the main computer to put the telescope and its scientific instruments into safe mode. What followed was many tense weeks as the operations team for the HST tried to figure out what the source of the problem was and come up with a strategy for turning Hubble back on.

On Friday, July 17th, after more than a month of checking, re-checking, and attempted restarts, the operations team for Hubble identified the root of the problem and restored power to the telescope’s hardware and all of its instruments. Science operations can now resume, and the pioneering space telescope that gave us over thirty years of dedicated astronomy, cosmology, and astrophysics, still has some life in her!

July 19, 2021July 20, 2021 by Scott Alan Johnston

Volcanic Activity on Venus Could Explain Phosphine

Ever since the announcement last September that astronomers found evidence of phosphine in the clouds of Venus, the planet has been getting a lot of attention. It’s not surprising. Phosphine is a potential biosignature: On Earth, it is produced by microbial life. Might a similar biological process be taking place in the skies of our sister planet? It’s a tantalizing prospect, and is definitely worth examining closely, but it’s too early to be sure. Microbes aren’t the only way to get phosphine. A new paper published on July 12th in the Proceedings of the National Academy of Science suggests that volcanism might instead be to blame for the strange chemistry in the Venusian cloud tops.

July 19, 2021July 19, 2021 by Paul M. Sutter

Where can we find a fifth force of nature?

Hubble image of Messier 54, a globular cluster located in the Sagittarius Dwarf Galaxy. Credit: ESA/Hubble & NASA

We know of four fundamental forces of nature, with no signs of a fifth. But dark matter and dark energy make up over 90% of all the contents of the universe. So the question remains: could there be a fifth force hiding in the “dark sector” of our universe?

July 19, 2021July 19, 2021 by Paul M. Sutter

We Need to Fix Space Junk Before It’s Too Late

Artist's impression of all the space junk in Earth orbit. Credit: NASA

As of 2020, there were over 19,000 pieces of individually tracked space junk in orbit above the Earth. Of those, a mere 2,200 were operational satellites. As more and more satellites go up, the risk of collisions increases. And what are governments doing to stop it? Basically, nothing.

July 19, 2021July 19, 2021 by Nancy Atkinson

Fantastic Visualization Shows What Would Happen if you Dropped a Ball Across the Solar System

Screen shot of ball drop across the solar system video.

Summertime means it’s time to play ball! But what would it be like to play ball on various locations across our Solar System? Planetary scientist Dr. James O’Donoghue has put together a fun animation of how quickly an object falls on to the surfaces of places like the Sun, Earth, Ceres, Jupiter, the Moon, and Pluto.

July 18, 2021July 18, 2021 by Matt Williams

New Images of Mars From China’s Rover

On May 14^th, 2021, the China National Space Agency (CNSA) achieved another major milestone when the Tianwen-1 lander successfully soft-landed on Mars, making China the second nation in the world to land a mission on Mars and establish communications from the surface. Shortly thereafter, China National Space Agency (CNSA) shared the first images taken by the Tianwen-1 lander.

By May 22^nd, 2021, the Zhurong rover descended from its lander and drove on the Martian surface for the first time. Since then, the rover has spent 63 Earth days conducting science operations on the surface of Mars and has traveled over 450 meters (1475 feet). On Friday, July 9th, and again on July 15th, the CNSA released new images of the Red Planet that were taken by the rover as it made its way across the surface.

July 17, 2021July 13, 2021 by Paul M. Sutter

WIMPS vs. Axions: What is dark matter?

Dark matter rules every galaxy. But what exactly is it? Astronomers believe it to be some kind of new, exotic particle. You may have heard some terms tossed around, like WIMPs or axions. Let’s explore what those terms actually mean.

July 16, 2021July 13, 2021 by Paul M. Sutter

Is the Universe a Fractal?

The structure of the universe at the largest scale. Credit: NASA, ESA, and E. Hallman (University of Colorado, Boulder)

We find examples of fractals everywhere in nature. Tree branches, snowflakes, river deltas, cloud formations, and more. So it’s natural to ask the ultimate question: is the entire universe one giant fractal? The answer is…no, but sorta yes.

July 16, 2021July 16, 2021 by Andy Tomaswick

Ingenuity is now Mapping the Terrain Around Perseverance

Having eyes in the sky is useful for a variety of activities. Everything from farming to military operations has benefited from the boom in drone usage, as the small aircraft track the progress of crop disease, enemy movements, or how awesome a professor skier looks going down a mountain. Now the benefits of aerial surveillance has spread to other worlds as Perseverance is starting to map out its path with help from Ingenuity.

July 15, 2021July 13, 2021 by Paul M. Sutter

Don’t Be Surprised if EmDrive Experiments Never Work

Artist's concept of an interstellar craft. Credit and Copyright: Mark Rademaker

Every few years the “EmDrive”, a proposed method of generating rocket thrust without any exhaust, hits the news. Each time, everyone asks: could this be it? Could this be the technological leap to revolutionize spaceflight?

Don’t hold your breath.