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Space security
Night or day, Lab-developed space-based telescope can image Earth and beyond
Lawrence Livermore National Laboratory (LLNL) researchers have developed and tested an optical telescope system that can be used for Earth and space observation. The team, led by Wim de Vries, built and tested several designs for high-resolution monolithic optical telescope systems, fabricated from a single piece of fused silica, for deployment on small satellites. After…
Kepler, don't give up on the hunt for exomoons
The Kepler spacecraft has been prolific in its search for planets outside our solar system, known as exoplanets, discovering thousands since its launch in 2009. But the hunt for moons orbiting these exoplanets, or exomoons, is vastly more challenging. While no exomoons have been found to date, a new study shows that the search is not futile. Researchers have demonstrated…
Making an Impact on Asteroid Deflection
When it comes to asteroids—rare but potentially cataclysmic threats to global security—the best defense is a good offense. The most hazardous planetary objects are near-Earth asteroids (NEAs), those found to be in orbits that allow them to enter Earth's neighborhood.
Here is what it will take to avoid extinction by asteroid
Sixty-five million years ago, a catastrophic impact forever changed the environmental landscape of Earth – and there was no way to see it coming. This Earth-bound asteroid – or maybe several – changed the course of millions of years of evolution, altered the composition of our atmosphere – and the geology of Central America for good measure.
Laboratory researchers find Earth composed of different materials than primitive meteorites
Scientists from Lawrence Livermore National Laboratory (LLNL) have found that, contrary to popular belief, the Earth is not comprised of the same material found in primitive meteorites (also known as chondrites). This is based on the determination that the abundance of several neodymium (Nd) isotopes are different in the Earth and in chondritic meteorites. A long-standing…
Team tracks core of massive object in universe
International scientists have identified the dynamics of the core of one of the most massive objects in the known universe, bringing insight into the cosmology of clusters of galaxies. The Hitomi collaboration, in which Lawrence Livermore National Laboratory scientist Greg Brown is a member, found that the turbulent motion of the intracluster gas in the Perseus cluster is…
These space rocks could save the planet
The box was inconspicuous, but Lawrence Livermore National Laboratory (LLNL) postdoctoral researcher Megan Bruck Syal immediately knew its contents: two meteorites around the size of walnuts. They formed about 4.6 billion years ago and survived a history of violent collisions in the asteroid belt before being bumped into a near-Earth-object orbit by gravitational…
LLNL researchers garner two contracts for rocket propulsion, space launch vehicle work
Two recent contracts worth nearly $1.5 million have brought the Laboratory back into the rocket development business.The last Livermore designed and fabricated rocket vehicle, powered by an LLNL engine, was launched from Vandenberg Air Force Base in 1994. It was conceived and designed by aerospace engineer John Whitehead and his team, which included collaborators from…
NASA taps Livermore photon scientists for heat-shield research
Researchers in Lawrence Livermore National Laboratory's NIF & Photon Science Directorate are working with NASA Ames Research Center at Moffet Field, California on the development of technology to simulate re-entry effects on the heat shield for the Orion spacecraft, NASA's next crewed spaceship. Orion is designed to carry astronauts beyond low Earth orbit to deep-space…
Lawrence Livermore 'space cops' to help control traffic in space
A team of Lawrence Livermore National Laboratory scientists are using mini-satellites that work as "space cops" to help control traffic in space. The scientists used a series of six images over a 60-hour period taken from a ground-based satellite to prove that it is possible to refine the orbit of another satellite in low earth orbit."Eventually our satellite will be…
Meteorite made up of rare early solar system material
It looked like a fireball in the sky. It created a sonic boom. It vaporized upon entering the atmosphere. It's all of the above: The Sutter's Mill Meteorite had the force of 4 kilotons of TNT upon descent and spilled samples of itself over the towns of Columa and Lotus in northern California when it hit Earth last spring. And now a consortium of scientists including…
Livermore students speak live with astronauts in space
Students at Livermore's Junction Avenue School had an opportunity that was "out of this world." They got the chance on Wednesday to talk with three astronauts via an in-flight education downlink from the International Space Station (ISS). The entire school's student body -- from kindergarten to 8th grade -- assembled in two locations to watch the videoconference. "What a…
Putting the squeeze on planets outside our solar system
LIVERMORE, Calif. -- Just as graphite can transform into diamond under high pressure, liquid magmas may similarly undergo major transformations at the pressures and temperatures that exist deep inside Earth-like planets. Using high-powered lasers, scientists at Lawrence Livermore National Laboratory and collaborators discovered that molten magnesium silicate undergoes a…
Oldest objects in solar system indicate a turbulent beginning
LIVERMORE, Calif. -- Scientists have found that calcium, aluminum-rich inclusions (CAIs), some of the oldest objects in the solar system, formed far away from our sun and then later fell back into the mid-plane of the solar system. The findings may lead to a greater understanding of how our solar system and possibly other solar systems formed and evolved. CAIs, roughly…
New pictures show fourth planet in giant version of our solar system
Astronomers have discovered a fourth giant planet, joining three others that, in 2008, were the subject of the first-ever pictures of a planetary system orbiting another star other than our sun. The solar system, discovered by a team from Lawrence Livermore National Laboratory and the National Research Council of Canada (NRC) Herzberg Institute of Astrophysics with…
