No Pessimist Ever Discovered The Secret Of The Stars, Or Sailed To An Uncharted Land, Or Opened A New

Really interesting to see a space-centric blog that isn't just pretty pictures of stars without any context. Your analyses and explanations of ongoing news aren't bad at all, so keep up the good work.

Thank you so much! I do my best to make sure my entries have good content, so I’m happy to know that you’re enjoying them!

Extraterrestrial Life May Be Closer Than We Think

Just when we think we have the universe somewhat figured out, it throws us a massive curveball from our very own backyard. Hold on to your telescopes, everyone, because one of our own planetary neighbors right around the corner may have the right conditions for extraterrestrial life.

On April 14, a paper published in Science Mag pointed out biochemical signatures of hydrogen production in the hydrothermal reactions in the form of plumes that erupt from the ice surface of Enceladus, one of Saturn’s moons. Molecular hydrogen is one of the building blocks of life because it is the ideal food source for microbes and bacteria, which are at the forefront of every food and energy chain (at least on Earth). This implies that the ocean beneath the ice has enough chemical activity and organic matter to maintain the right conditions to sustain life, at least on the molecular level. This kind of chemistry can indicate habitable zones in Enceladus’ ocean. 

To provide a bit of a context from here on Earth: our own oceans contain deep-sea hydrothermal vents that are home to complex and important ecosystems that allow microorganisms to live and grow by using energy from the minerals produced by these vents. These microorganisms are necessary for food and energy chains to form since larger organisms feed on these microorganisms and create entire ecological communities. Many scientists have pointed out these kinds of superheated environments as prime locations for life to begin. 

But having the right conditions for life doesn’t mean already harboring life. There is still a lot that we don’t know about what’s going on below the surface of Enceladus. While scientists have known about its ocean since 2005, it is only now that technology has improved to the point where it can pick up sensitive biochemical signatures and provide a more detailed picture of Saturn’s icy moon. 

Recently, NASA has announced a mission called Europa Clipper that will explore Europa, another one of Jupiter’s icy moons with an ocean. It will launch sometime in the 2020s. Perhaps NASA will consider stopping by Enceladus...who knows what we can find there?

Solar System: Things to Know This Week

Earth is the ultimate ocean planet (that we know of), but it turns out that our solar system has water in some surprising places, with five ocean-bearing moons and potentially several more worlds with their own oceans. 

1. The Original “Alien Ocean”

Our Galileo spacecraft (1989-2003) detected the first evidence of an ocean beyond Earth under the ice of Jupiter’s icy moon Europa.

2. Lost Oceans

There are signs that Mars and Venus once had oceans, but something catastrophic may have wiped them out. Earth’s natural force field – our magnetosphere – acts like shield against the erosive force of the solar wind.

3. Earth, the Original Ocean World

The search for life beyond Earth relies, in large part, on understanding our home planet. Among the newest Earth ocean explorers us the Cyclone Global Navigation Satellite System, or CYGNSS–a constellation of microsatellites that will make detailed measurements of wind speeds over Earth’s oceans to help understand hurricanes. The spacecraft have moved into their science operations phase.

4. Sister Ships

It’s fitting the first mission to explore an alien ocean is named in honor of fast-sailing clipper ships of old. Our Europa Clipper spacecraft will seek signs of habitability on Jupiter’s moon Europa.

5. Game Changer

Scientists expected Saturn’s moon Enceladus to be a tiny, solid chunk of ice and rock. But, not long after arriving at Saturn, our Cassini spacecraft made a series of incremental discoveries, eventually confirming that a global subsurface ocean is venting into space, with signs of hydrothermal activity.

6. Why Ocean Worlds Matter

“The question of whether or not life exists beyond Earth, the question of whether or not biology works beyond our home planet, is one of humanity’s oldest and yet unanswered questions. And for the first time in the history of humanity, we have the tools and technology and capability to potentially answer this question. And, we know where to go to find it. Jupiter’s ocean world Europa.” - Kevin Hand, NASA Astrobiologist

7. More Alien Oceans

Scientists think Jupiter’s giant moons Ganymede and Callisto also hide oceans beneath their surfaces. Elsewhere in the solar system, scientists hope to look for hidden oceans on far-flung worlds from Ceres in the main asteroid belt to Pluto in the Kuiper Belt.

8. Cold Faithful(s)?

Thanks to our Cassini orbiter we know the tiny moon Enceladus is venting its ocean into space in a towering, beautiful plume. The Hubble Space Telescope also has seen tantalizing hints of plumes on Jupiter’s moon Europa. Plumes are useful because they provide samples of ocean chemistry for oceans that could be miles below the surface and difficult for spacecraft to reach. It’s like they’re giving out free samples!

9. Titanic Seas and Ocean

Saturn’s moon Titan not only has liquid hydrocarbon seas on its surface. It also shows signs of a global, subsurface saltwater ocean–making the giant moon a place to possibly look for life as we know it and life as we don’t know it … yet.

10. Oceans Beyond

Several of the thousands of planets discovered beyond our solar system orbit their stars in zones where liquid surface water is possible–including Proxima-b, a rocky planet orbiting the star nearest to our own.

BONUS: Adopt a bit of YOUR Ocean World

We invite everyone to help us celebrate Earth Day 2017 by virtually adopting a piece of Earth as seen from space. Your personalized adoption certificate will feature data from our Earth-observing satellites for a randomly assigned location, much of it ocean (it is 70 percent of the Earth’s surface after all!). Print it and share it, then explore other locations with our interactive map and get even more Earth science data from NASA’s Worldview website.

Visit go.nasa.gov/adopt to adopt your piece of the planet today!

Discover more lists of 10 things to know about our solar system HERE.

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A 2015 documentary on the history of space, the current progress of space exploration, and where we might go in the future.

If you have around an hour to spare, and a space itch to scratch, this is an awesome documentary to watch! It has very good scientific support, fantastic HD visuals, and exciting narration. It really opens your eyes to how much we’ve discovered only recently, and also how much we still don’t know. Great documentary!

The beautiful Milky Way taken in one of the most darkest skies in the world over Boa Vista in the Cape Verde Islands. photo by James Atkinson

js

10 Technologies That Are Changing the Game

Earlier this year, we hosted a Game Changing Technology Industry Day for the aerospace industry, and in October our engineers and technologists visited Capitol Hill showcasing some of these exciting innovations. Check out these technology developments that could soon be making waves on Earth and in space.

1. Wearable technology

With smartwatches, glasses, and headsets already captivating users around the world, it’s no surprise that the next evolution of wearable technology could be used by first responders at the scene of an accident or by soldiers on a battlefield. The Integrated Display and Environmental Awareness System (IDEAS) is an interactive optical computer that works for smart glasses. 

It has a transparent display, so users have an unobstructed view even during video conferences or while visualizing environmental data. 

And while the IDEAS prototype is an innovative solution to the challenges of in-space missions, it won’t just benefit astronauts – this technology can be applied to countless fields here on Earth.

2. Every breath they take: life support technologies

Before astronauts can venture to Mars and beyond, we need to significantly upgrade our life support systems. The Next Generation Life Support project is developing technologies to allow astronauts to safely carry out longer duration missions beyond low-Earth orbit. 

The Variable Oxygen Regulator will improve the control of space suit pressure, with features for preventing decompression sickness. The Rapid Cycle Amine technology will remove carbon dioxide and humidity and greatly improve upon today’s current complex system.

3. 3-D printing (for more than just pizza)

New Advanced Manufacturing Technologies (AMT), such as 3-D printing, can help us build rocket parts more quickly and aid in building habitats on other planets. 

These manufacturing initiatives will result in innovative, cost-efficient solutions to many of our planetary missions. Back in 2014, the International Space Station’s 3-D printer manufactured the first 3-D printed object in space, paving the way to future long-term space expeditions. 

The object, a printhead faceplate, is engraved with names of the organizations that collaborated on this space station technology demonstration: NASA and Made In Space, Inc., the space manufacturing company that worked with us to design, build and test the 3-D printer.

4. Spacecraft landing gear

Large spacecraft entering the atmosphere of Mars will be traveling over five times the speed of sound, exposing the craft to extreme heat and drag forces. The Hypersonic Inflatable Aerodynamic Decelerator (HIAD) is designed to protect spacecraft from this environment with an inflatable structure that helps slow a craft for landing. 

To get astronauts and other heavy loads to the surface safely, these components must be very strong. The inflatable consists of a material 15 times stronger than steel, while the thermal protection system can withstand temperatures over 1600°C.

5. From heat shield technology to firefighter shelters

For the Convective Heating Improvement for Emergency Fire Shelters (CHIEFS) project, we partnered with the U.S. Forest Service to develop safer, more effective emergency fire shelters for wild land firefighters. 

Using existing technology for flexible spacecraft heat shields like HIAD, we are building and testing new fire shelters composed of stacks of durable, insulated materials that could help protect the lives of firefighters.

6. Robots and rovers

Real life is looking a bit more like science fiction as Human Robotics Systems are becoming highly complex. They are amplifying human productivity and reducing mission risk by improving the effectiveness of human-robot teams. 

Our humanoid assistant Robonaut is currently aboard the International Space Station helping astronauts perform tasks.

A fleet of robotic spacecraft and rovers already on and around Mars is dramatically increasing our knowledge and paving the way for future human explorers. The Mars Science Laboratory Curiosity rover measured radiation on the way to Mars and is sending back data from the surface. 

This data will help us plan how to protect the astronauts who will explore Mars. 

Future missions like the Mars 2020 rover, seeking signs of past life, will demonstrate new technologies that could help astronauts survive on the Red Planet.

7. Robotic repairs

Currently, a satellite that is even partially damaged cannot be fixed in orbit. Instead, it must be disposed of, which is a lot of potential science lost.

Satellite Servicing technologies would make it possible to repair, upgrade, and even assemble spacecraft in orbit using robotics.

This can extend the lifespan of a mission, and also enable deeper space exploration. 

Restore-L, set to launch in 2020, is a mission that will demonstrate the ability to grab and refuel a satellite.

8. Low-cost spacecraft avionics controllers

Small satellites, or smallsats, are quickly becoming useful tools for both scientists and industry. However, the high cost of spacecraft avionics—the systems that guide and control the craft—often limits how and when smallsats can be sent into orbit by tagging along as payloads on larger launches. 

Using Affordable Vehicle Avionics (AVA) technology, we could launch many more small satellites using an inexpensive avionics controller. This device is smaller than a stack of six CD cases and weighs less than two pounds!

9. Making glass from metal

After a JPL research team of modern-day alchemists set about mixing their own alloys, they discovered that a glass made of metal had the wear resistance of a ceramic, was twice as strong as titanium, and could withstand the extreme cold of planetary surfaces, with temperatures below -150 degrees Fahrenheit.

Bulk Metallic Glass (BMG) gears would enable mechanisms to function without wasting energy on heaters. Most machines need to maintain a warmer temperature to run smoothly, which expends precious fuel and decreases the mission’s science return. 

By developing gearboxes made of BMG alloys, we can extend the life of a spacecraft and learn more about the far reaches of our solar system than ever before. Plus, given their extremely high melting points, metallic glasses can be cheaply manufactured into parts by injection molding, just like plastics.

10. Lighter, cheaper, safer spacecraft fuel tanks

Cryogenic propellant tanks are essential for holding fuel for launch vehicles like our Space Launch System—the world’s most powerful rocket. But the current method for building these tanks is costly and time-consuming, involving almost a mile of welded parts.

Advanced Near Net Shape Technology, part of our Advanced Manufacturing Technologies, is an innovative manufacturing process for constructing cryotanks, using cylinders that only have welds in one area. 

This makes the tank lighter, cheaper, and safer for astronauts, as there are fewer potentially defective welds.

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Beautiful photo! This reminds me of the time my family and I went to Yellowstone National Park around four years ago. We arrived at the park around midnight and were treated to the clearest star-filled night sky we had ever seen. It was stunning - the stars stretched from one horizon to the next, and there was no end to them. It made me feel very small in the grand scope of the universe, and just how much we miss out when we become accustomed to city lights and the urban sprawl. Makes me want to go camping in some remote place again.

The Milky Way from Acadia National Parks Thunder Hole

js

Absolutely love this shot from the extremely talented Nicholas Buer. Reminds me of this awe inspiring quote from physicist Brian Greene about the challenge humanity faces to understand the cosmos:

“We all love a good story. We all love a tantalizing mystery. We all love the underdog pressing onward against seemingly insurmountable odds. We all, in one form or another, are trying to make sense of the world around us. And all of these elements lie at the core of modern physics. The story is among the grandest – the unfolding of the entire universe; the mystery is among the toughest – finding out how the cosmos came to be; the odds are among the most daunting – bipeds, newly arrived by cosmic time scales trying to reveal the secrets of the ages; and the quest is among the deepest – the search for fundamental laws to explain all we see and beyond, from the tiniest particles to the most distant galaxies.” — Brian Greene

Exploration is wired into our brains. If we can see the horizon, we want to know what’s beyond.

Buzz Aldrin

Let me start off by saying that I think Crash Course is a great resource for people who want to get the basic details of any subject the creators offer. CC’s series for astronomy is particularly wonderful. The science behind astronomy and space can be mind-boggling due to the complexities of physics, mathematics, photonics, and other relevant subjects; CC makes it easy and fun to learn about astronomy without being too technical or in-depth. Great series of videos if you have time to check them out!