Universe Today

May 12, 2020May 12, 2020 by Evan Gough

Spacecraft and Ground Telescopes Work Together to Give us Stunning New Pictures of Jupiter

A Hubble Telescope image of Jupiter's Great Red Spot. A new effort is combining Hubble, Juno, and Gemini Observatory images in an effort to understand Jupiter's stormy behaviour. Image Credit: NASA, ESA, and M.H. Wong (UC Berkeley) and team

It’s difficult to imagine the magnitude of storms on Jupiter. The gas giant’s most visible atmospheric feature, the Great Red Spot, may be getting smaller, but one hundred years ago, it was about 40,000 km (25,000 miles) in diameter, or three times Earth’s diameter.

Jupiter’s atmosphere also features thunderheads that are five times taller than Earth’s: a whopping 64 km (40 miles) from bottom to top. Its atmosphere is not entirely understood, though NASA’s Juno spacecraft is advancing our understanding. The planet may contain strange things like a layer of liquid metallic hydrogen.

Now a group of scientists are combining the power of the Hubble Space Telescope, the Gemini Observatory and the Juno spacecraft to probe Jupiter’s atmosphere, and the awe-inspiring storms that spawn there.

May 11, 2020May 20, 2020 by Matt Williams

Lunar Gateway Could be Built With the Falcon Heavy

In March of 2019, NASA was directed by the White House to land human beings on the Moon within five years. Known as Project Artemis, this expedited timeline has led to a number of changes and shakeups at NASA, not the least of which has to do with the deprioritizing of certain elements. Nowhere is this more clear than with the Lunar Gateway, an orbital habitat that NASA will be deploying to cislunar space in the coming years.

Originally, the Gateway was a crucial part of the agency’s plan to create a program of “sustainable lunar exploration.” In March of this year, NASA announced that the Lunar Gateway is no longer a priority and that Artemis will rely on an integrated lunar lander instead. However, NASA still hopes to build the Gateway, and according to a recent interview with ArsTechnica, this could be done with the help of SpaceX and the Falcon Heavy.

May 11, 2020May 11, 2020 by Evan Gough

Newly Reprocessed Images of Europa Make This World Even More Interesting and Mysterious

A "colorized" image of Europa from NASA's Galileo spacecraft, whose mission ended in 2003. The whiteish areas are believed to be pure water ice. Credit: NASA/JPL-Caltech/SETI Institute

Jupiter’s moon Europa is the smoothest object in the Solar System. There are no mountains, very few craters, and no valleys. It’s tallest features are isolated massifs up to 500 meters (1640 ft) tall.

But its surface is still of great interest, both visually and from a science perspective. And with a future mission to Europa in the works—possibly with a lander—a detailed knowledge of the surface is essential. It may have surface features called penitentes, that could be up to 15 meters (49 t) tall, posing a serious hazard for any lander.

May 10, 2020May 10, 2020 by Matt Williams

Closest Black Hole Found, Just 1,000 Light-Years From Earth

This artist’s impression shows the orbits of the objects in the HR 6819 triple system. Credit: ESO/L. Calçada

Black holes are invisible to the naked eye, have no locally detectable features, and even light can’t escape them. And yet, their influence on their surrounding environment makes them the perfect laboratory for testing physics under extreme conditions. In particular, they offer astronomers a chance to test Einstein’s Theory of General Relativity, which postulates that the curvature of space-time is altered by the presence of a gravity.

Thanks to a team of astronomers led by the European Southern Observatory (ESO), the closest black hole has just been found! Using the ESO’s La Silla Observatory in Chile, the team found this black hole in a triple system located just 1000 light-years from Earth in the Telescopium constellation. Known as HR 6819, this system can be seen with the naked eye and could one of many “quiet” black holes that are out there.

May 9, 2020May 24, 2020 by Matt Williams

Space Force is Recruiting, Here’s their New Video

The US Space Force has revealed their uniforms. Image Credit: US Space Force

“Maybe your purpose on this planet… isn’t on this planet!”

These spine-tingling words cap off the US Space Force’s (USSF) new recruitment video, which hit the airwaves earlier this week. After giving a rundown of what the USSF’s responsibilities are, the video culminates with that beautiful tagline, in which people are invited to find their place off-world!

While this video is pretty short and sweet, it represents a significant milestone in the development of the USSF as an independent branch of the US Armed Forces – a process that began in earnest just a few years ago.

May 8, 2020May 8, 2020 by Evan Gough

A Cool Idea to Catch Up With an Interstellar Visitor

Artist’s impression of the first interstellar asteroid/comet, "Oumuamua". This unique object was discovered on 19 October 2017 by the Pan-STARRS 1 telescope in Hawaii. Credit: ESO/M. Kornmesser

Poor, dim-witted humanity.

We used to think we were the center of everything. That wasn’t that long ago, and even though we’ve made tremendous advancements in our understanding of our situation here in space, we still have huge blind spots.

For one, we’re only now waking up to the reality of interstellar objects passing through our Solar System.

May 8, 2020May 8, 2020 by Matt Williams

Galaxies Like the Milky Way are the Best for Life

The core of the Milky Way. Credit: NASA/JPL-Caltech/S. Stolovy (SSC/Caltech)

Scientists have speculated that given the sheer number of galaxies in our Universe – modern estimates are as high as 2 trillion – that there must be infinite opportunities for life to emerge. It has also been theorized that galaxies (like stars) have habitable zones, where star systems located too close to the core or too far out in the spiral arms will be exposed to too much radiation for life to emerge.

But are certain types of galaxies more likely to produce intelligent life? Not that long ago, scientists believed that giant elliptical galaxies – which are substantially larger than spiral galaxies (like the Milky Way) – are a far more likely place to find advanced civilizations. But according to new research from the University of Arkansas, these galaxies may not be the cradles of civilization they were previously thought to be.

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May 8, 2020May 8, 2020 by Evan Gough

New Data Show How Phytoplankton Pumps Carbon Out of the Atmosphere at an Enormous Scale

One of the most fascinating things about planet Earth is the way that life shapes the Earth and the Earth shapes life. We only have to look back to the Great Oxygenation Event (GOE) of 2.4 billion years ago to see how lifeforms have shaped the Earth. In that event, phytoplanktons called cyanobacteria pumped the atmosphere with oxygen, extinguishing most life on Earth, and paving the way for the development of multicellular life.

Early Earth satisfied the initial conditions for life to appear, and now, lifeforms shape the atmosphere, the landscape, and the oceans in many different ways.

At the base of many of these changes is phytoplankton.

May 8, 2020 by David Dickinson

Review: Galileo and the Science Deniers by Mario Livio

So, you think you know Galileo? A new book out from Simon and Schuster publishing looks at the exploits of one of the most famous astronomers there ever was: Galileo Galilei. Galileo and the Science Deniers by Dr. Mario Livio not only looks at the life and times of the famous astronomer, but busts some of the most famous myths surrounding Galileo, and looks at his greatest discoveries and tempestuous clash with the Roman Catholic Church and its aftermath. Livio also connects the science denialism of the day with comparisons to modern clashes between politics and science.

May 7, 2020May 18, 2020 by Matt Williams

When Did Mars Lose its Global Magnetic Field?

NASA’s Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft celebrated one Earth year in orbit around Mars on Sept. 21, 2015. MAVEN was launched to Mars on Nov. 18, 2013 from Cape Canaveral Air Force Station in Florida and successfully entered Mars’ orbit on Sept. 21, 2014. Credit: NASA

Billions of years ago, Mars was once a much different place than the cold and desiccated place it is today. Basically, it had a thicker, warmer atmosphere and liquid water flowing on its surface, and maybe even life! The reason for this is because, like Earth, Mars had a planetary magnetic field that was generated by action in its core. But when that field disappeared, things began to change drastically!

For years, scientists believed that this field disappeared over 4 billion years ago, causing Mars’ atmosphere to be slowly stripped away by solar wind. But according to new research led by the University of British Columbia (UBC) has placed new constraints on when this magnetic field disappeared, indicating that Mars’ magnetic field existed sooner (and laster hundreds of millions of years longer) than previously thought.