Our Voyager 1 spacecraft officially became the first human-made object to venture into interstellar space in 2012.
Whether and when our Voyager 1 spacecraft broke through to interstellar space, the space between stars, has been a thorny issue.
In 2012, claims surfaced every few months that Voyager 1 had “left our solar system.” Why had the Voyager team held off from saying the craft reached interstellar space until 2013?
Basically, the team needed more data on plasma, which is an ionozied gas that exists throughout space. (The glob of neon in a storefront sign is an example of plasma).
Plasma is the most important marker that distinguishes whether Voyager 1 is inside the solar bubble, known as the heliosphere. The heliosphere is defined by the constant stream of plasma that flows outward from our Sun – until it meets the boundary of interstellar space, which contains plasma from other sources.
Adding to the challenge: they didn’t know how they’d be able to detect it.
No one has been to interstellar space before, so it’s like traveling with guidebooks that are incomplete.
Additionally, Voyager 1’s plasma instrument, which measures the density, temperature and speed of plasma, stopped working in 1980, right after its last planetary flyby.
When Voyager 1 detected the pressure of interstellar space on our heliosphere in 2004, the science team didn’t have the instrument that would provide the most direct measurements of plasma.
Voyager 1 Trajectory
Instead, they focused on the direction of the magnetic field as a proxy for source of the plasma. Since solar plasma carries the magnetic field lines emanating from the Sun and interstellar plasma carries interstellar magnetic field lines, the directions of the solar and interstellar magnetic fields were expected to differ.
Voyager 2 Trajectory
In May 2012, the number of galactic cosmic rays made its first significant jump, while some of the inside particles made their first significant dip. The pace of change quickened dramatically on July 28, 2012. After five days, the intensities returned to what they had been. This was the first taste test of a new region, and at the time Voyager scientists thought the spacecraft might have briefly touched the edge of interstellar space.
By Aug. 25, when, as we now know, Voyager 1 entered this new region for good, all the lower-energy particles from inside zipped away. Some inside particles dropped by more than a factor of 1,000 compared to 2004. However, subsequent analysis of the magnetic field data revealed that even though the magnetic field strength jumped by 60% at the boundary, the direction changed less than 2 degrees. This suggested that Voyager 1 had not left the solar magnetic field and had only entered a new region, still inside our solar bubble, that had been depleted of inside particles.
Then, in April 2013, scientists got another piece of the puzzle by chance. For the first eight years of exploring the heliosheath, which is the outer layer of the heliosphere, Voyager’s plasma wave instrument had heard nothing. But the plasma wave science team had observed bursts of radio waves in 1983 and 1984 and again in 1992 and 1993. They determined these bursts were produced by the interstellar plasma when a large outburst of solar material would plow into it and cause it to oscillate.
It took about 400 days for such solar outbursts to reach interstellar space, leading to an estimated distance of 117 to 177 AU (117 to 177 times the distance from the Sun to the Earth) to the heliopause.
Then on April 9, 2013, it happened: Voyager 1’s plasma wave instrument picked up local plasma oscillations. Scientists think they probably stemmed from a burst of solar activity from a year before. The oscillations increased in pitch through May 22 and indicated that Voyager was moving into an increasingly dense region of plasma.
The above soundtrack reproduces the amplitude and frequency of the plasma waves as “heard” by Voyager 1. The waves detected by the instrument antennas can be simply amplified and played through a speaker. These frequencies are within the range heard by human ears.
When they extrapolated back, they deduced that Voyager had first encountered this dense interstellar plasma in Aug. 2012, consistent with the sharp boundaries in the charged particle and magnetic field data on Aug. 25.
In the end, there was general agreement that Voyager 1 was indeed outside in interstellar space, but that location comes with some disclaimers. They determined the spacecraft is in a mixed transitional region of interstellar space. We don’t know when it will reach interstellar space free from the influence of our solar bubble.
Voyager 1, which is working with a finite power supply, has enough electrical power to keep operating the fields and particles science instruments through at least 2020, which will make 43 years of continual operation.
Voyager 1 will continue sending engineering data for a few more years after the last science instrument is turned off, but after that it will be sailing on as a silent ambassador.
In about 40,000 years, it will be closer to the star AC +79 3888 than our own Sun.
And for the rest of time, Voyager 1 will continue orbiting around the heart of the Milky Way galaxy, with our Sun but a tiny point of light among many.
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The twin tails are seen more clearly in this WISPR instrument processed image, which increased contrast and removed excess brightness from scattered sunlight, revealing more de-"tails". C/2020 F3 NEOWISE was discovered by our Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE), on March 27. Since it's discovery the comet has been spotted by several NASA spacecraft, including Parker Solar Probe, NASA’s Solar and Terrestrial Relations Observatory, the ESA/NASA Solar and Heliospheric Observatory, and astronauts aboard the International Space Station.
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In honor of the completion of our Nancy Grace Roman Space Telescope’s spacecraft — the vehicle that will maneuver the observatory to its place in space and enable it to function once there — we’re bringing you a space craft you can complete at home! Join us for a journey across the cosmos, starting right in your own pantry.
Ingredients:
1 5 oz. bottle clear glue
½ tablespoon baking soda
Food coloring
1 tablespoon contact lens solution
1 tablespoon glitter
Directions:
Pour the glue into a bowl.
Mix in the baking soda.
Add food coloring (we recommend blue, purple, black, or a combination).
Add contact lens solution and use your hands to work it through the slime. It will initially be very sticky! You can add a little extra contact lens solution to make it firmer and less goopy.
Add glitter a teaspoon at a time, using as much or as little as you like!
Did you know that most of your household ingredients are made of stardust? And so are you! Nearly every naturally occurring element was forged by living or dying stars.
Take the baking soda in this slime recipe, for example. It’s made up of sodium, hydrogen, carbon, and oxygen. The hydrogen was made during the big bang, right at the start of the universe. But the other three elements were created by dying stars. So when you show your friends your space-y slime, you can tell them it’s literally made of stardust!
Still feeling crafty? Try your hand at more pantry projects or these 3D and paper spacecraft models. If you’re eager for a more advanced space craft, check out these embroidery creations for inspiration! Or if you’re ready for a break, take a virtual tour of an interactive version of the Roman Space Telescope here.
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In space, invisible, fast-moving particles from the Sun and other sources in deep space zip around, their behavior shaped by dynamic electric and magnetic fields. There are so few of these particles that space is considered a vacuum, but what’s there packs a punch. Together, we call all of this invisible activity space weather — and it affects our technology both in space and here on Earth.
This month, two new missions are launching to explore two different kinds of space weather.
Many of our communications and navigation systems — like GPS and radio — rely on satellites to transmit their signals. When signals are sent from satellites down to Earth, they pass through a dynamic zone on the upper edge of Earth's atmosphere called the ionosphere.
Gases in the ionosphere have been cooked into a sea of positive- and negative-charged particles by solar radiation. These electrically charged particles are also mixed in with neutral gases, like the air we breathe. The charged particles respond to electric and magnetic fields, meaning they react to space weather. Regular weather can also affect this part of the atmosphere.
Influenced by this complicated web of factors, structured bubbles of charged gas sometimes form in this part of the atmosphere, particularly near the equator. When signals pass through these bubbles, they can get distorted, causing failed communications or inaccurate GPS fixes.
Right now, it's hard to predict just when these bubbles will form or how they'll mess with signals. The two tiny satellites of the E-TBEx mission will try to shed some light on this question.
As these CubeSats fly around Earth, they'll send radio signals to receiving stations on the ground. Scientists will examine the signals received in order to see whether — and if so, how much — they were jumbled as they traveled through the upper atmosphere and down to Earth.
All together, this information will give scientists a better idea of how these bubbles form and change and how much they disrupt signals — information that could help develop strategies for mitigating these bubbles' disruptive effects.
The high-energy, fast-moving particles that fill space are called radiation. Every single spacecraft — from scientific satellites sprinkled throughout the solar system to the communications satellites responsible for relaying the GPS signals we use every day — must weather the harsh radiation of space.
Strikes from tiny, charged particles can spark memory damage or computer upsets on spacecraft, and over time, degrade hardware. The effects are wide-ranging, but ultimately, radiation can impact important scientific data, or prevent people from getting the proper navigation signals they need.
Space Environment Testbeds — or SET, for short — is our mission to study how to better protect satellites from space radiation.
SET aims its sights on a particular neighborhood of near-Earth space called the slot region: the gap between two of Earth’s vast, doughnut-shaped radiation belts, also known as the Van Allen Belts. The slot region is thought to be calmer than the belts, but known to vary during extreme space weather storms driven by the Sun. How much it changes exactly, and how quickly, remains uncertain.
The slot region is an attractive one for satellites — especially commercial navigation and communications satellites that we use every day — because from about 12,000 miles up, it offers not only a relatively friendly radiation environment, but also a wide view of Earth. During intense magnetic storms, however, energetic particles from the outer belt can surge into the slot region.
SET will survey the slot region, providing some of the first day-to-day weather measurements of this particular neighborhood in near-Earth space. The mission also studies the fine details of how radiation damages instruments and tests different methods to protect them, helping engineers build parts better suited for spaceflight. Ultimately, SET will help other missions improve their design, engineering and operations to avoid future problems, keeping our space technology running smoothly as possible.
For more on our space weather research, follow @NASASun on Twitter and NASA Sun Science on Facebook.
Meet the other NASA missions launching on the Department of Defense's STP-2 mission and get the latest updates at nasa.gov/spacex.
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XO Travel Bureau: https://exoplanets.nasa.gov/galleries/exoplanet-travel-bureau/ Mars Valentine’s: http://mars.nasa.gov/free-holiday-ecard/love-valentine/ Space Place Valentine’s: http://spaceplace.nasa.gov/valentines/en/ OSIRIS-REx Valentine’s: http://www.asteroidmission.org/galleries/#collectables
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@yesrazorbladecupcakes: Do you guys ever just goof off?
Europa Clipper is a space mission crafted with one overarching goal: determine if Jupiter’s ocean moon, Europa, has conditions suitable for life. Watch launch live on Oct. 14 as the largest uncrewed spacecraft we've ever built begins its journey into the solar system.
Gather ‘round with us today and experience history as it unfolded 50 years ago.
Watch NASA TV at 4:02 p.m. EDT as we replay the original live broadcast of the Apollo 11 Moon landing.
Then, at 10:38 p.m. EDT, watch the replay of the original live broadcast of the first steps on the Moon, as the world watched it in 1969:
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Soichi Noguchi was selected as an astronaut with the Japan Aerospace Exploration Agency in 1996. A native of Yokohama, Kanagawa, he is currently a mission specialist for NASA’s SpaceX Crew-1 launch taking flight to the International Space Station on Nov. 14. Soichi will be the first international crewmember on Crew Dragon and the first international partner astronaut to fly aboard three types of orbital spacecraft – the U.S. space shuttle, the Russian Soyuz, and now the SpaceX Crew Dragon! Talk about impressive. He received a B.S. in Aeronautical Engineering in 1989, master's degree in Aeronautical Engineering in 1991, Doctor of Philosophy in Advanced Interdisciplinary Studies in 2020, all from the University of Tokyo.
Soichi took time from preparing for his historic mission to answer questions about his life and career:
After my second flight, I started this research about your sensory system in zero gravity. I used a my own personal video, which I took during my last two flights at the International Space Station. I had a lot of interesting discussions amongst young professionals and students at the University of Tokyo about the research. It was a fun experience – but I would not do it again!
Space IS definitely a risky business. But the reward is higher than the risk so that’s why we take it.
Three words: Space. Is. Waiting.
We have a lot of interesting missions to do, but my personal goal is to return home with lots of fun stories.
It was 25 years ago, but I still remember the voice vividly. I got a call from Dr. Mamoru Mohri, the very first JAXA astronaut, and he said “Welcome to the Astronaut Corps.” When I got the call to be part of the Crew-1 mission, I was a lot less nervous than when I was assigned to my first mission, but the excitement remains the same.
He is a natural leader that takes care of the team really well, and he’s fun to play around with.
Star Wars… just because!
My favorite photo is Mount Fuji because I see the mountain almost every day when I was a child. It’s definitely breathtaking to see Mount Fuji from space.
I have lots of family photos, and I would put it inside my sleep station. Definitely one of the most challenging things about spaceflight is not experiencing zero gravity, not the rocket, but time away from family.
It’s an excursion. The view of the Earth is just breathtaking because you are just one glass away from the vacuum of space. There’s nothing between you and Earth.
I would say I’m most excited for interplanetary travel to become more common so that the school kids can go to Mars on their field trip.
Don’t worry, be happy!
This is definitely an exciting moment. We’re starting to see more players in the game. SpaceX is the frontrunner, but soon we’ll see Boeing, Sierra Nevada and Axiom. So the International Space Station will soon have more players involved, and it will be a lot more fun!
Thank you for your time, Soichi, and good luck on your historic mission! Get to know a bit more about Soichi and his NASA astronaut crew mates Victor Glover, Michael Hopkins, and Shannon Walker in the video above.
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Ahhh, Earth. Our home planet and oasis in space. You’re probably very familiar with this world, but here are a few things you may not know about our “Pale Blue Dot” of a planet.
From the vantage point of space, we are able to observe our planet globally using sensitive instruments to understand the delicate balance among its oceans, air, land and life. Satellite observations help study and predict weather, drought, pollution, climate change and many other phenomena that affect the environment, economy and society.
1. Known to Harbor Life
Of the nine planets, countless asteroids and meteors in our solar system, Earth is the only one known to harbor life. It has a thin layer of atmosphere that separates us from the coldness of space.
2. All By Its Lonesome
Unlike some other planets in the system that have three or more rings, the Earth has zero, but we do have one lonely moon that orbits us.
3. Moving At The Speed Of Life
Earth is the third planet from the sun and is located about 93,000,000 miles away from it. At this distance, the Earth moves at 66,000 miles per hour through space to complete its 365 day rotation.
4. You Can Breathe Easy
Earth’s atmosphere is 78% nitrogen, 21% oxygen and about 1% other ingredients. Most other planets in our solar system have an atmosphere, but Earth’s is the only one that’s breathable.
5. For Real?
Did you grow up thinking that each calendar year was 365 days long? It’s actually 365 days, 5 hours, 48 minutes and 56 seconds...in other words, it’s 365.2564 days long. This is why an extra day is add during a leap year: to help offset this time difference.
6. Far Out
We measure the distance of planets in our solar system in a measurement known as an Astronomical Unit, or AU. This measurement is based on the distance of the Earth from the sun. Earth is one AU from the sun, while Mars is 1.52 AU and Jupiter is 5.2 AU.
7. Taking Selfies...Before It Was Cool
The first ever photo of Earth was captured on October 24, 1946 when a V-2 test rocket was launched into space from New Mexico.
8. Slumped Over Already
The Earth doesn’t sit upright like you would think. It’s actually sitting on its side a bit, or rotational axis as it’s called, the Earth sits at a 23.45 degree rotational axis spin.
9. How Original...
How did it get the name Earth? The name “Earth” is at least 1,000 years old. All the planets in our system are named after Greek and Roman gods and goddesses, except for Earth. The name itself is of English and German origin and simply means “ground”.
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As the Apollo 11 mission lifted off on the Saturn V rocket, propelling humanity to the surface of the Moon for the very first time, members of the team inside Launch Control Center watched through a window.
The room was crowded with men in white shirts and dark ties, watching attentively as the rocket thrust into the sky. But among them sat one woman, seated to the left of center in the third row in the image below. In fact, this was the only woman in the launch firing room for the Apollo 11 liftoff.
This is JoAnn Morgan, the instrumentation controller for Apollo 11. Today, this is what Morgan is most known for. But her career at NASA spanned over 45 years, and she continued to break ceiling after ceiling for women involved with the space program.
“It was just meant to be for me to be in the launching business,” she says. “I’ve got rocket fuel in my blood.”
Morgan was inspired to join the human spaceflight program when Explorer 1 was launched into space in 1958, the first satellite to do so from the United States. Explorer 1 was instrumental in discovering what has become known as the Van Allen radiation belt.
“I thought to myself, this is profound knowledge that concerns everyone on our planet,” she says. “This is an important discovery, and I want to be a part of this team. I was compelled to do it because of the new knowledge, the opportunity for new knowledge.”
The opportunity came when Morgan spotted an advertisement for two open positions with the Army Ballistic Missile Agency. The ad listed two Engineer’s Aide positions available for two students over the summer.
“Thank God it said ‘students’ and not ‘boys’” says Morgan, “otherwise I wouldn’t have applied.”
After Morgan got the position, the program was quickly rolled into a brand-new space exploration agency called NASA. Dr. Kurt Debus, the first director of Kennedy Space Center (KSC), looked at Morgan’s coursework and provided Morgan with a pathway to certification. She was later certified as a Measurement and Instrumentation Engineer and a Data Systems Engineer.
There was a seemingly infinite amount of obstacles that Morgan was forced to overcome — everything from obscene phone calls at her station to needing a security guard to clear out the men’s only restroom.
“You have to realize that everywhere I went — if I went to a procedure review, if I went to a post-test critique, almost every single part of my daily work — I’d be the only woman in the room,” reflects Morgan. “I had a sense of loneliness in a way, but on the other side of that coin, I wanted to do the best job I could.”
To be the instrumentation controller in the launch room for the Apollo 11 liftoff was as huge as a deal as it sounds. For Morgan, to be present at that pivotal point in history was ground-breaking: “It was very validating. It absolutely made my career.”
Much like the Saturn V rocket, Morgan’s career took off. She was the first NASA woman to win a Sloan Fellowship, which she used to earn a Master of Science degree in management from Stanford University in California. When she returned to NASA, she became a divisions chief of the Computer Systems division.
From there, Morgan excelled in many other roles, including deputy of Expendable Launch Vehicles, director of Payload Projects Management and director of Safety and Mission Assurance. She was one of the last two people who verified the space shuttle was ready to launch and the first woman at KSC to serve in an executive position, associate director of the center.
To this day, Morgan is still one of the most decorated women at KSC. Her numerous awards and recognitions include an achievement award for her work during the activation of Apollo Launch Complex 39, four exceptional service medals and two outstanding leadership medals. In 1995, she was inducted into the Florida Women's Hall of Fame.
After serving as the director of External Relations and Business Development, she retired from NASA in August 2003.
Today, people are reflecting on the 50th anniversary of Apollo 11, looking back on photos of the only woman in the launch firing room and remembering Morgan as an emblem of inspiration for women in STEM. However, Morgan’s takeaway message is to not look at those photos in admiration, but in determination to see those photos “depart from our culture.”
“I look at that picture of the firing room where I’m the only woman. And I hope all the pictures now that show people working on the missions to the Moon and onto Mars, in rooms like Mission Control or Launch Control or wherever — that there will always be several women. I hope that photos like the ones I’m in don’t exist anymore.”
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