There are more than 3,900 confirmed planets beyond our solar system. Most of them have been detected because of their “transits”—instances when a planet crosses its star, momentarily blocking its light. These dips in starlight can tell astronomers a bit about a planet’s size and its distance from its star. But knowing more about the…
Existing Laser Technology Could Be Fashioned into Earth’s ‘Porch Light’ to Attract Alien Astronomers
If extraterrestrial intelligence exists somewhere in our galaxy, a new MIT study proposes that laser technology on Earth could, in principle, be fashioned into something of a planetary porch light—a beacon strong enough to attract attention from as far as 20,000 light years away. The research, which author James Clark calls a “feasibility study,” appears…
Software Finds the Best Way to Stick a Mars Landing
Selecting a landing site for a rover headed to Mars is a lengthy process that normally involves large committees of scientists and engineers. These committees typically spend several years weighing a mission’s science objectives against a vehicle’s engineering constraints, to identify sites that are both scientifically interesting and safe to land on. For instance, a…
Researchers 3-D Print Colloidal Crystals
MIT engineers have united the principles of self-assembly and 3-D printing using a new technique, which they highlight today in the journal Advanced Materials. By their direct-write colloidal assembly process, the researchers can build centimeter-high crystals, each made from billions of individual colloids, defined as particles that are between 1 nanometer and 1 micrometer across. “If…
Researcher Discusses The Launch Of The Parker Solar Probe
On Saturday, NASA launched a bold mission to fly directly into the sun’s atmosphere, with a spacecraft named the Parker Solar Probe, after solar astrophysicist Eugene Parker. The incredibly resilient vessel, vaguely shaped like a lightbulb the size of a small car, was launched early in the morning from Cape Canaveral Air Force Station in…
Researchers Develop Virtual-Reality Testing Ground For Drones
Training drones to fly fast, around even the simplest obstacles, is a crash-prone exercise that can have engineers repairing or replacing vehicles with frustrating regularity. Now MIT engineers have developed a new virtual-reality training system for drones that enables a vehicle to “see” a rich, virtual environment while flying in an empty physical space. The system, which the team…
Satellite Aims To Discover Thousands Of Nearby Exoplanets, Including At Least 50 Earth-Sized Ones
There are potentially thousands of planets that lie just outside our solar system—galactic neighbors that could be rocky worlds or more tenuous collections of gas and dust. Where are these closest exoplanets located? And which of them might we be able to probe for clues to their composition and even habitability? The Transiting Exoplanet Survey…