Space and Beyond

Talks on astrophysics and space pictures

[thelostspaceman]

Cold Welding: In space metals with similar compositions can become one by just touching. This phenomenon is called cold welding and this is due to an absence of an oxide layer on metals in space which cause the metals to fuse and become one. In practice this happens rarely due to irregularities in metal surface and a remaining layer of oxide still on metal brought to space. However, it is entirely possible and experiments have proven it to be so.

[thelostspaceman]

The False Vacuum Theory: In short it is the theory that we are in a seemingly stable region of space but in reality we are in an unstable bubble of the actual universe. This bubble could collapse at any moment and create a vacuum, completely turning us into particles to be recycled back into the universe. What do you think? Do you believe it is possible?

[just--space]

Stars and Dust Pillars in NGC 7822 from WISE.

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[astronomy-is-awesome]

Nebula Images: http://nebulaimages.com/

Astronomy articles: http://astronomyisawesome.com/

[thelostspaceman]

Just amazing the colors that space can conjure up and combine.

[spacettf]

NGC 7538 by Remidone Via Flickr: Camera: SBIG ST-10XME sensor -20°C with Sbig CFW10 and SXV-AO-LF Optics: GSO 10" f/8 RC carbon fiber Filters: Baader Exposure time (seconds): HA: 39×1200 bin 1×1 SII: 17×1200 bin 1×1 OIII: 19×1200 bin 1×1 Place: Pesaro (PU) Italy Date: 27/08/2016 - 02/09/2016

[amazinguniverses]

NGC 6888: The Crescent Nebula by Michael Miller, Jimmy Walker

[just--space]

The Twin Jet Nebula

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[just--space]

An Interacting pair of galaxies

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[spacettf]

Omega Centauri: The Brightest Globular Cluster in the Milky Way by Terry Robison Via Flickr: Omega Centauri, or NGC 5139, is a large globular cluster located within the constellation of Centaurus. This object was first identified as a non-stellar object by Edmond Halley in 1677. It is the largest globular cluster in our galaxy, and is located roughly 15,800 light years away, with a diameter 150 light-years. It is an incredibly bright object, containing approximately 10 million stars which allow it to be seen visually without optical aid. With an apparent magnitude of 3.9, it can be imaged from under light polluted skies. This image was taken from the suburbs of Melbourne Australia, under 80-70 percent full moon. The instruments used were a 10 inch RCOS, SBIG STL-11000, on an Astro-Physics Mount. Imaging dates:24-29 of May 2016 Calibration Software:CCDStack Processing Software:Photoshop 6 Filters Used:Astrodon LRGB Terry Robison

[cosmicvastness]

Elegance conceals an eventful past

The elegant simplicity of NGC 4111, seen here in this image from the NASA/ESA Hubble Space Telescope, hides a more violent history than you might think. NGC 4111 is a lenticular, or lens-shaped, galaxy, lying about 50 million light-years from us in the constellation of Canes Venatici (The Hunting Dogs).

At first sight, NGC 4111 looks like a fairly uneventful galaxy, but there are unusual features that suggest it is not such a peaceful place. Running through its centre, at right angles to the thin disc, is a series of filaments, silhouetted against the bright core of the galaxy. These are made of dust, and astronomers think they are associated with a ring of material encircling the galaxy’s core. Since it is not aligned with the galaxy’s main disc, it is possible that this polar ring of gas and dust is actually the remains of a smaller galaxy that was swallowed up by NGC 4111 long ago.

Credit: ESA/Hubble & NASA Acknowledgement: Judy Schmidt

[cosmicvastness]

The Carina Nebula

The Carina Nebula is a large bright nebula that surrounds several clusters of stars. It contains two of the most massive and luminous stars in our Milky Way galaxy, Eta Carinae and HD 93129A. Located 7500 light years away, the nebula itself spans some 260 light years across, about 7 times the size of the Orion Nebula, and is shown in all its glory in this mosaic. It is based on images collected with the 1.5-m Danish telescope at ESO’s La Silla Observatory.

Credit: ESO/IDA/Danish 1.5 m/R.Gendler, J-E. Ovaldsen, C. Thöne, and C. Feron.

[thelostspaceman]

It's always amazes me how beautiful our universe is!

[cosmicvastness]

NGC 1600

The elliptical galaxy NGC 1600, 200 million light-years away — shown in the centre of the image and highlighted in the box —, hosts in its centre one of the biggest supermassive black holes known . Until the discovery of this example, astronomers assumed that such huge black holes could only be found in the centres of massive galaxies at the centre of galaxy clusters. NGC 1600, however, is a rather isolated galaxy.

The image is a composition of a ground based view and observations made with the NASA/ESA Hubble Space Telescope.

Credit: NASA, ESA, Digital Sky Survey 2

[cosmicvastness]

The Eagle Nebula

Three-colour composite mosaic image of the Eagle Nebula (Messier 16, or NGC 6611), based on images obtained with the Wide-Field Imager camera on the MPG/ESO 2.2-metre telescope at the La Silla Observatory. At the centre, the so-called “Pillars of Creation” can be seen. This wide-field image shows not only the central pillars, but also several others in the same star-forming region, as well as a huge number of stars in front of, in, or behind the Eagle Nebula. The cluster of bright stars to the upper right is NGC 6611, home to the massive and hot stars that illuminate the pillars. The “Spire” — another large pillar — is in the middle left of the image.

Credit: ESO

[just--space]

The Galactic Center in Infrared : The center of our Galaxy is a busy place. In visible light, much of the Galactic Center is obscured by opaque dust. In infrared light, however, dust glows more and obscures less, allowing nearly one million stars to be recorded in the featured photograph. The Galactic Center itself appears on the left and is located about 30,000 light years away towards the constellation of the Archer . The Galactic Plane of our Milky Way Galaxy, the plane in which the Sun orbits, is identifiable by the dark diagonal dust lane. The absorbing dust grains are created in the atmospheres of cool red-giant stars and grow in molecular clouds. The region directly surrounding the Galactic Center glows brightly in radio and high-energy radiation, and is thought to house a large black hole. via NASA

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[just--space]

HAWK-I image of Messier 100

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[nasa]

Crazy Facts About the #YearInSpace

Astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko returned from their One-Year Mission on March 1. When you spend a year doing anything, you’re bound to accumulate some crazy stats. Here are a few:

During their year in space, Kelly and Kornienko traveled over 143 million miles, conducting research to prepare us for our journey to Mars, which will be about 140,000,000 miles from Earth.

The International Space Station travels at a speed of 5 miles per second and orbits the Earth every 90 minutes.

These visiting vehicles brought food, supplies, experiments and more crew members to the space station.

Since the space station is orbiting the Earth at 17,500 miles per hour, the crew onboard sees 16 sunrises and sunsets each day.

Water is a precious and limited resource in space, so crew members recycle it whenever possible. That includes recycling their own urine.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com

[nasa]

What You Should Know About Scott Kelly’s #YearInSpace

1. It’s Actually More Like a Three-Year Mission

NASA astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko may have had a year-long stay in space, but the science of their mission will span more than three years. One year before they left Earth, Kelly and Kornienko began participating in a suite of investigations aimed at better understanding how the human body responds to long-duration spaceflight. Samples of their blood, urine, saliva, and more all make up the data set scientists will study. The same kinds of samples continued to be taken throughout their stay in space, and will continue for a year or more once they return.

2. What We Learn is Helping Us Get to Mars

One of the biggest hurdles of getting to Mars is ensuring humans are “go” for a long-duration mission and that crew members will maintain their health and full capabilities for the duration of a Mars mission and after their return to Earth. Scientists have solid data about how bodies respond to living in microgravity for six months, but significant data beyond that timeframe had not been collected…until now. A mission to Mars will likely last about three years, about half the time coming and going to Mars and about half the time on Mars. We need to understand how human systems like vision and bone health are affected by the 12 to 16 months living on a spacecraft in microgravity and what countermeasures can be taken to reduce or mitigate risks to crew members during the flight to and from Mars. Understanding the challenges facing humans is just one of the ways research aboard the space station helps our journey to Mars.

3. The Science Will Take Some Time

While scientists will begin analyzing data from Kelly and Kornienko as soon as they return to Earth, it could be anywhere from six months to six years before we see published results from the research. The scientific process takes time, and processing the data from all the investigations tied to the one-year mission will be no easy task. Additionally, some blood, urine and saliva samples from Kelly and Kornienko will still be stored in the space station freezers until they can be returned on the SpaceX Dragon spacecraft. Early on in the analytical process scientists may see indications of what we can expect, but final results will come long after Kelly and Kornienko land.

4. This Isn’t the First Time Someone Has Spent a Year in Space

This is the first time that extensive research using exciting new techniques like genetic studies has been conducted on very long-duration crew members. Astronaut Scott Kelly is the first American to complete a continuous, year-long mission in space and is now the American who has spent the most cumulative time in space, but it’s not the first time humans have reached this goal. Previously, only four humans have spent a year or more in orbit on a single mission, all aboard the Russian Mir Space Station. They all participated in significant research proving that humans are capable of living and working in space for a year or more.

Russian cosmonaut Valery Polyakov spent 438 days aboard Mir between January 1994 and March 1995 and holds the all-time record for the most continuous days spent in space.

Cosmonaut Sergei Avdeyev spent 380 days on Mir between August 1998 and August 1999.

Cosmonauts Vladimir Titov and Musa Manarov completed a 366-day mission from December 1987 to December 1988.

5. International Collaboration is Key

The International Space Station is just that: international. The one-year mission embodies the spirit of collaboration across countries in the effort to mitigate as many risks as possible for humans on long-duration missions. Data collected on both Kelly and Kornienko will be shared between the United States and Russia, and international partners. These kinds of collaborations help increase more rapidly the biomedical knowledge necessary for human exploration, reduce costs, improve processes and procedures, and improve efficiency on future space station missions.

6. So Much Science!

During Kelly’s year-long mission aboard the orbiting laboratory, his participation in science wasn’t limited to the one-year mission investigations. In all, he worked on close to 400 science studies that help us reach for new heights, reveal the unknown, and benefit all of humanity. His time aboard the station included blood draws, urine collection, saliva samples, computer tests, journaling, caring for two crops in the Veggie plant growth facility, ocular scans, ultrasounds, using the space cup, performing runs with the SPHERES robotic satellites, measuring sound, assisting in configuring cubesats to be deployed, measuring radiation, participating in fluid shifts testing in the Russian CHIBIS pants, logging his sleep and much, much more. All of this was in addition to regular duties of station maintenance, including three spacewalks!

7. No More Food in Pouches

After months of eating food from pouches and cans and drinking through straws, Kelly and Kornienko will be able to celebrate their return to Earth with food of their choice. While aboard the space station, their food intake is closely monitored and designed to provide exactly the nutrients they need. Crew members do have a say in their on-orbit menus but often miss their favorite meals from back home. Once they return, they won’t face the same menu limitations as they did in space. As soon as they land on Earth and exit the space capsule, they are usually given a piece of fruit or a cucumber to eat as they begin their initial health checks. After Kelly makes the long flight home to Houston, he will no doubt greatly savor those first meals.

8. After the Return Comes Reconditioning

You’ve likely heard the phrase, “Use it or lose it.” The same thing can be said for astronauts’ muscles and bones. Muscles and bones can atrophy in microgravity. While in space, astronauts have a hearty exercise regimen to fight these effects, and they continue strength training and reconditioning once they return to Earth. They will also participate in Field Tests immediately after landing. Once they are back at our Johnson Space Center, Functional Task Tests will assess how the human body responds to living in microgravity for such a long time. Understanding how astronauts recover after long-duration spaceflight is a critical piece in planning for missions to deep space.

9. Twins Studies Have Researchers Seeing Double

One of the unique aspects of Kelly’s participation in the one-year mission is that he has an identical twin brother, Mark, who is a former astronaut. The pair have taken part in a suite of studies that use Mark as a human control on the ground during Scott’s year-long stay in space. The Twins Study is comprised of 10 different investigations coordinating together and sharing all data and analysis as one large, integrated research team. The investigations focus on human physiology, behavioral health, microbiology/microbiome and molecular/omics. The Twins Study is multi-faceted national cooperation between investigations at universities, corporations, and government laboratories.

10. This Mission Will Help Determine What Comes Next

The completion of the one-year mission and its studies will help guide the next steps in planning for long-duration deep space missions that will be necessary as humans move farther into the solar system. Kelly and Kornienko’s mission will inform future decisions and planning for other long-duration missions, whether they are aboard the space station, a deep space habitat in lunar orbit, or a mission to Mars.

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