Elizabeth Howell is the senior writer at Universe Today. She also works for Space.com, Space Exploration Network, the NASA Lunar Science Institute, NASA Astrobiology Magazine and LiveScience, among others. Career highlights include watching three shuttle launches, and going on a two-week simulated Mars expedition in rural Utah. You can follow her on Twitter @howellspace or contact her at her website.
Separation of the third stage during the Sentinel-1 launch in April 2014. Credit: Arianespace/European Space Agency /Roscosmos (YouTube/screenshot)
Imagine clinging on to the side of a rocket, somehow able to hang on despite the high speeds and diminishing oxygen. Looking down, this is what you’ll see — the view in the video above. This incredible sequence shows Sentinel-1a during its initial climb to orbit last week and, if you wait long enough, you can even see the separation of the third stage.
“Arianespace’s successful Soyuz Flight VS07 — which deployed Sentinel-1A to Sun-synchronous orbit — gave the world a front-row seat in space,” the company stated on YouTube. “Cameras mounted on the Soyuz’ Fregat upper stage captured the spectacular footage … as Sentinel-1A was separated at approximately 700 km [434 miles] above the Earth to commence its life in orbit.”
Sentinel-1a is the first of a series of environmental monitoring satellites overseen by the European Space Agency, a set that promises views of the Earth in high-definition.
Hubble Space Telescope image of the El Gordo galaxy cluster. This and other gigantic galaxy clusters are challenging the most common theory of the evolution of structure in the Universe. Credit: NASA, ESA, and J. Jee (University of California, Davis)
The Hubble Space Telescope has a new calculation for the huge El Gordo galaxy cluster: 3 million billion times the mass of the Sun. This is even 43 per cent more massive than past estimates that examined the complex in X-rays, NASA stated.
“A fraction of this mass is locked up in several hundred galaxies that inhabit the cluster and a larger fraction is in hot gas that fills the entire volume of the cluster. The rest is tied up in dark matter, an invisible form of matter that makes up the bulk of the mass of the universe,” the Space Telescope Science Institute stated.
“Though galaxy clusters as massive are found in the nearby universe, such as the so-called Bullet Cluster, nothing like this has ever been seen to exist so far back in time, when the universe was roughly half of its current age of 13.8 billion years. The team suspects such monsters are rare in the early universe, based on current cosmological models.”
An intriguing signal could be due to "dark matter annihilations" pops up on the left of this data gathered by NASA's Fermi Gamma-ray Space Telescope. The image on left shows the galactic center in gamma rays with energies between 1 and 3.16 GeV. Red indicates the most activity, and the labels are for pulsars. The image at right has all these gamma-ray sources removed. Credit: T. Linden, Univ. of Chicago
Sometimes a strange signal comes from the dark and it takes a while to figure out what that signal means. In this case, scientists analyzing high-energy gamma rays emanating from the galaxy’s center found an unexplained source of emission that they say is “consistent with some forms of dark matter.”
The data came courtesy of NASA’s Fermi Gamma-ray Space Telescope and was analyzed by a group of independent scientists. They found that by removing all known sources of gamma rays, they were left with gamma-ray emissions that so far, they cannot explain. More observations will be needed to characterize these emissions, they cautioned.
Also, the location of the radiation at the galaxy’s center is an interesting spot, since scientists believe that’s where dark matter would lurk since the insofar invisible substance would be the base of normal structures like galaxies.
“The new maps allow us to analyze the excess and test whether more conventional explanations, such as the presence of undiscovered pulsars or cosmic-ray collisions on gas clouds, can account for it,” stated Dan Hooper, an astrophysicist at Fermilab and lead author of the study.
“The signal we find cannot be explained by currently proposed alternatives and is in close agreement with the predictions of very simple dark matter models.”
The scientists suggest that if WIMPs were destroying each other, this would be “a remarkable fit” for a dark matter signal. They again caution, though, that there could be other explanations for the phenomenon.
“Dark matter in this mass range can be probed by direct detection and by the Large Hadron Collider (LHC), so if this is dark matter, we’re already learning about its interactions from the lack of detection so far,” stated co-author Tracy Slatyer, a theoretical physicist at the Massachusetts Institute of Technology.
“This is a very exciting signal, and while the case is not yet closed, in the future we might well look back and say this was where we saw dark matter annihilation for the first time.”
The successful liftoff of Sentinel-1A in April 2014. Credit: ESA-S.Corvaja, 2014
And we have liftoff — two times over! Launch fans got a double treat yesterday when two space missions successfully left Earth. First came a morning launch at 10:46 a.m. Eastern (2:46 p.m. UTC) when DMSP-19 (a satellite of the Defense Meteorological Satellite Program) took off from Vandenberg Air Force Base in California. You can watch the replay below the jump.
“The satellite launched today is equipped with a sophisticated sensor suite that can capture visible and infrared cloud cover; measure precipitation, surface temperature and soil moisture; and collect specialized global meteorological, oceanographic and solar-geophysical information in all weather conditions. DMSP-19 joins six other satellites in polar orbit providing weather information,” stated Lockheed Martin, the long-standing prime contractor of the program.
And just above this paragraph is the French Guiana launch of Sentinel-1A, the first half of a pair of environmental monitoring satellites that should show the Earth in high-definition to the European Space Agency and customers. Then below the jump you can see the successful separation of Sentinel-1A in space. The launch took place at 5:02 p.m. Eastern (9:02 p.m. UTC).
Just in case you aren’t already in French Guiana, here’s your chance to watch a European environment radar satellite take a rocket ride. Tune into the webcast above to see Sentinel-1A’s launch. If the schedule holds, the launch will be at 5:02 p.m. EDT (9:02 p.m. UTC) on April 3, 2014. Watch live above!
ESA heralds Sentinel-1 as a “new era in Earth observation” because the satellite duo (yes, it will be eventually two satellites) will vastly improve their ability to send out information on natural disasters and quick-moving Earth observation events. Sentinel-1 will in fact be the first of a satellite series feeding into the same information system.
Once the second half of the duo launches in 2016, Sentinel-1 will have a wide swath of geographical coverage, could go to the same areas quickly, and would send data out quickly. Repeatable and rapid Earth observations will bring data quickly into the hands of the authorities who could make decisions about evacuations and other things.
This information will be fed into Copernicus, a new system that will co-ordinate all of the Sentinel satellites for users to gain information.
“The Sentinels will provide a unique set of observations, starting with the all-weather, day and night radar images from Sentinel-1 to be used for land and ocean services,” ESA stated in an explanation about Copernicus.
“Sentinel-2 will deliver high-resolution optical images for land services and Sentinel-3 will provide data for services relevant to the ocean and land. Sentinel-4 and Sentinel-5 will provide data for atmospheric composition monitoring from geostationary and polar orbits, respectively.”
And here are a few of the other applications ESA foresees it would be useful for: sea-ice measurements, looking for oil spills, tracking ships, flagging land with “motion risks” and also doing mapping for the forestry industry.
As far as the webcast, there’s a schedule of speeches and events beforehand at the European Space Agency’s space operations center in Darmstadt, Germany. Be sure to tune in a bit earlier at 3:30 p.m. EST (7:30 p.m. UTC) to see the ceremonies.
One of the first pictures released from UrtheCast in April 2014 showed several hundred square miles around Moneague, Jamaica. Credit: UrtheCast
UrtheCast — the company aiming to bring high-definition pictures of Earth to the public — is among the exemptions after NASA severed most ties officially with Russia yesterday (April 2), the company said in a press release.
“It is business as usual for the company, as we continue the commissioning of our cameras on the International Space Station,” stated Wade Larson, UrtheCast President and chief operating officer.
“The ISS has long enjoyed a privileged position in international diplomacy and has survived unscathed during multiple international crises in recent years. In fact, we understand that the ISS has been nominated for this year’s Nobel Peace Prize. I think that says a lot.”
The news came around the same time that UrtheCast revealed its first pictures from its two cameras, which were installed by Russian spacewalkers in January following a failed attempt in December.
The new pictures reveal a few hundred square miles of Moneague, Jamaica and Santa Cruz de Mara, Venezuela, both taken on March 28.
“This is a pivotal moment for the company and for everyone who’s been a part of the vision that we set in motion in the fall of 2010. Our team has been working extremely hard to make certain that we reach this goal of democratizing a very powerful perspective on the planet,” stated Scott Larson, UrtheCast co-founder and chief executive officer.
The company is promising there will soon be a “near realtime” stream of Earth observations from the cameras’ perch on the International Space Station. Read more about the company’s plans in this past Universe Today story.
Following a leaked memo early yesterday, NASA released an official statement saying that it would sever most ties with Russia except for those related to International Space Station operations. The United States is among several countries condemning Russia’s decision to bring troops to Crimea a few weeks ago. The decision will likely affect several planetary science agreements with Russia, planetary scientist Barbara Cohen said on Twitter after the news was released.
A grouping of galaxies, known as J0717 (center) is visible in this Spitzer Space Telescope image. Credit: NASA/JPL-Caltech/P. Capak (Caltech)
Talk about turning back time. Three NASA observatories — the Hubble Space Telescope, the Chandra X-Ray Observatory and the Spitzer Space Telescope — are all working together to look for the universe’s first galaxies. The project is called “Frontier Fields” and aims to examine these galaxies through a technique called gravitational lensing, which allows astronomers to peer at more distant objects when massive objects in front bend their light.
“Our overall science goal with the Frontier Fields is to understand how the first galaxies in the universe assembled,” stated Peter Capak, a research scientist with the NASA/JPL Spitzer Science Center at the California Institute of Technology and the Spitzer lead for the Frontier Fields.
“This pursuit is made possible by how massive galaxy clusters warp space around them, kind of like when you look through the bottom of a wine glass.”
Using the three observatories allows investigators to peer at the galaxies in different light wavelengths (namely, infrared for Spitzer, shorter infrared and optical for Hubble, and X-rays for Chandra). The teams also plan to learn more about how the foreground clusters influence the “warping” of the galaxies behind.
The Hubble and Spitzer telescopes are designed to locate where the galaxies are (and if they are indeed early galaxies) while Chandra can map out the X-ray emissions to better determine the galaxies’ masses. An early example of this project at work was examination of Abell 2744, which yielded a distant find: Abell2744 Y1, one of the earliest known galaxies, which was born about 650 million years after the Big Bang.
Expedition 38 crew members proudly sport their national flags in this March 2014 picture from the International Space Station. Pictured (clockwise from top center) are Russian cosmonaut Oleg Kotov, commander; Japan Aerospace Exploration Agency astronaut Koichi Wakata, Russian cosmonaut Sergey Ryazanskiy, NASA astronauts Rick Mastracchio and Mike Hopkins, and Russian cosmonaut Mikhail Tyurin, all flight engineers. Credit: NASA
NASA plans to cease most work with the Russian Federal Space Agency amid growing tensions concerning the Ukrainian crisis, a spokesperson confirmed with a statement to Universe Today Wednesday evening (April 2).
While the International Space Station will still see work to “maintain safe and continuous operation”, most other NASA activities with Roscosmos will cease, the statement read. It added (citing the Obama administration) that Congress now faces a choice between fully funding human U.S. launches again in 2017, or facing years more of sending money to the Russians for Soyuz launches from Kazakhstan.
In full, this is the statement that Bob Jacobs, NASA’s deputy associate administrator of communications, sent to Universe Today (UPDATE, 8:54 p.m. EDT — this is also now available on NASA’s G+ page)
Given Russia’s ongoing violation of Ukraine’s sovereignty and territorial integrity, NASA is suspending the majority of its ongoing engagements with the Russian Federation. NASA and Roscosmos will, however, continue to work together to maintain safe and continuous operation of the International Space Station.
NASA is laser focused on a plan to return human spaceflight launches to American soil, and end our reliance on Russia to get into space. This has been a top priority of the Obama Administration’s for the past five years, and had our plan been fully funded, we would have returned American human spaceflight launches – and the jobs they support – back to the United States next year.
With the reduced level of funding approved by Congress, we’re now looking at launching from U.S. soil in 2017. The choice here is between fully funding the plan to bring space launches back to America or continuing to send millions of dollars to the Russians. It’s that simple. The Obama Administration chooses to invest in America – and we are hopeful that Congress will do the same.
It is unclear from this statement exactly what activities would constitute “safe and continuous operation” of station. So, for example, it’s unclear so far if (for example) NASA will still send photographers to cover launches and landing in Russia, or to what extent NASA TV broadcasts of Russian spacewalks would be affected.
Since the shuttle retired in 2011, NASA and other space agencies such as the European Space Agency have relied on Russian Soyuz spacecraft to bring astronauts to the International Space Station. Crews are generally made up of large proportions of Russian cosmonauts and American astronauts, as well as a few astronauts from other agencies. The current Expedition 39 crew has has three Russians, two Americans and a Japanese commander, Koichi Wakata. Expedition 40 will launch aboard a Soyuz spacecraft in May, if all goes to plan.
The crew members of Expedition 40/41 pose in front of a Soyuz spacecraft simulator in Star City, Russia. From left, Alex Gerst (European Space Agency), Max Suraev (Roscosmos) and Reid Wiseman (NASA). Credit: NASA
The human spaceflight relationship between NASA and Russia stretches back to the 1970s when Russia was then the Soviet Union. Their first joint mission was with the Apollo-Soyuz Test Project in 1975. That relationship expanded when several NASA shuttles visited the Russian space station Mir in the 1990s, laying the groundwork for the International Space Station agreement today.
NASA is working on a commercial crew program that right now is slated to bring U.S. astronauts into space from American soil again in 2017. There are several proposals being considered: a human-rated version of SpaceX’s Dragon, Blue Origin’s New Shepard, Sierra Nevada Corp.’s Dream Chaser and the Boeing Co.’s CST-100. NASA releases regular updates on how these companies — most of which receive money from the agency for development — are progressing, with the most recent update coming March 31.
It is unclear, however, how much money CCP will receive in the upcoming fiscal 2015 budget request before Congress. Historically, NASA receives less money for this program than what the agency requests (which has pushed back launches by a few years). The new tensions with Russia, however, could make things different this time around. This seems to be what NASA is counting on in the statement.
As far as what missions could be affected due to cooperation with Russia, planetary scientist Barbara Cohen said on Twitter that while it may appear the US may do little with Russia beyond the International Space Station, cooperation in planetary science is rather big. Russian scientists contribute to several ongoing and upcoming NASA robotic missions, and US scientists are contributing to the planning for ExoMars, which is an ESA-Roscosmos mission, and the US is contributing Elektra telecommunication radios to the orbiter and part of a mass spectrometer for the rover. Additionally, US scientists are working with the Verera-D mission, a strategic Venus mission sponsored by Roscosmos, with participation by NASA’s Planetary Science Division.
The news of the breach comes about a month after NASA administrator Charlie Bolden told reporters that the Russian diplomacy crisis, which erupted after troops went to Crimea a few weeks ago (to U.S. and other countries’ condemnation), would not affect Soyuz launches or other activities related to the space station.
Screenshot from NASA TV of the Soyuz TMA-09M spacecraft arriving at the International Space Station.
“Everything is nominal right now in our relationship with the Russians. We continue to monitor the situation,” said NASA administrator Charles Bolden in a conference call with reporters March 4, following the release of NASA’s preliminary budget request.
“The safety of our crews and our assets that has not changed. Safety is the No. 1 of NASA’s core values, so we are constantly doing contingency planning on the International Space Station for emergencies that might arise,” Bolden added, citing an emergency ammonia pump replacement in December as one such example.
“Those are the kinds of things we are always planning for, and in terms of the situation on the ground, we will go into contingency planning for that as the situation dictates. But right now, we don’t see any reason to do so,” he added.
International Space Station operations were recently extended to at least 2024, and NASA officials have pointed out that it and similar agreements have weathered other world crises.
Wednesday’s news first came to light in a reported internal memo posted on SpaceRef’s website that morning. Jacobs did not confirm or deny the memo’s authenticity in the e-mail to Universe Today.
Universe Today will issue updates as circumstances warrant.
An airplane at about 2,400 meters above the ground passes in front of the Moon on its way to landing at the Charles de Gaulle Airport in Paris, France. Taken from about 70 km from Paris. Credit and copyright: Sebastien Lebrigand.
Stuff from Earth’s interior, combined with simulations, have one research team pinning down the Moon’s age to only 95 million years after the Solar System formed (which would make our closest satellite about 4.4 billion years old.)
The simulation involved replicating how the Earth and the other terrestrial planets (Mercury, Venus and Mars) grew from a protoplanetary disc surrounding the young Sun. After 259 simulations, the researchers uncovered a link between when a Mars-sized object smacked Earth (eventually forming the Moon) and how much material Earth gained after the crash.
“This correlation just jumped out of the simulations and held in each set of old simulations we looked at,” stated Seth Jacobson of the Observatory of Cote d’Azur in France, who led the study.
Buzz Aldrin’s bootprint on the surface of the moon during the Apollo 11 mission on July 20, 1969. Credit: NASA
Researchers are calling this a “geologic clock” that dates the Moon independently from the samples Apollo astronauts collected from the moon in the 1960s and 1970s, which were dated using radioactive decay of atomic nuclei. The Earth’s mass was estimated using previously published material examining how plentiful “siderophile” (iron-associated) elements were in Earth’s mantle.
The exact date, for the curious, puts the Moon’s formation at 95 ±32 million years after the solar system began. The measurement agrees with some, but not all, radioactive dating methods.
The researchers argue that this new understanding will help scientists figure out which of the radioactive dating methods are the most useful to figure out the Moon’s age, but it will be interesting to see what other teams think of that conclusion.
An image mosaic of ice breaking up in the Arctic Ocean's Canada Basin on March 28, 2014. Image taken by Operation IceBridge's Digital Mapping System. Credit: Digital Mapping System/NASA Ames
The Arctic melt season is averaging five days longer with each passing decade, a new study by NASA and the National Snow and Ice Data Center reveals. And with more ice-free days, the water (which is darker than the surrounding ice) is absorbing the sun’s heat and accelerating the process. This means the Arctic ice cap has shrank by as much as four feet.
The sobering news comes following a study of satellite data from 1979 to 2013. By the end of this century, scientists believe, there will be a fully melted Arctic Ocean during the entire summer. And the news also comes in the same week that the Intergovernmental Panel on Climate Change (IPCC) released its own report on global warming.
“The Arctic is warming and this is causing the melt season to last longer,” stated Julienne Stroeve, a senior scientist at NSIDC, Boulder and lead author of a new study. “The lengthening of the melt season is allowing for more of the sun’s energy to get stored in the ocean and increase ice melt during the summer, overall weakening the sea ice cover.”
The research further revealed that solar radiation absorption depends on when the melt season begins; this is particularly true since the sun rises higher during the spring, summer and fall than in the winter. It’s still hard to predict when things will melt or freeze, however, since this depends on weather.
“There is a trend for later freeze-up, but we can’t tell whether a particular year is going to have an earlier or later freeze-up,” Stroeve said. “There remains a lot of variability from year to year as to the exact timing of when the ice will reform, making it difficult for industry to plan when to stop operations in the Arctic.”
Data was collected with NASA’s (long deceased) Nimbus-7 Scanning Multichannel Microwave Radiometer and instruments aboard Defense Meteorological Satellite Program spacecraft.
“When ice and snow begin to melt, the presence of water causes spikes in the microwave radiation that the snow grains emit, which these sensors can detect,” NASA stated. “Once the melt season is in full force, the microwave emissivity of the ice and snow stabilizes, and it doesn’t change again until the onset of the freezing season causes another set of spikes.”
The research has been accepted for publication in Geophysical Research Letters.
