Can geoengineering stop global warming

Can geoengineering stop global warming?

The worst effects of climate change could be safely curbed by spraying sun-reflecting chemicals into the high atmosphere, a new U.S. study suggests. Scientists have long wondered if it might be possible to artificially cool the planet by blocking some of the sun’s rays with sulfate aerosols— chemicals naturally spewed Continue Reading

THE NEXT RUNNER IN THE EXOPLANET RACE

THE NEXT RUNNER IN THE EXOPLANET RACE

EXOPLANET SCIENTISTS EXPERIENCED A HANDOFF IN THE RACE TO FIND HABITABLE PLANETS ON APRIL 18, when NASA’s new exoplanet hunter, the Transiting Exoplanet Survey Satellite (TESS), launched. Three months later, TESS began science operations as the previous exoplanet-search workhorse, the Kepler space telescope, went into safe mode due to low Continue Reading

STRONGEST EVIDENCE YET OF AN EXOMOON

STRONGEST EVIDENCE YET OF AN EXOMOON

SCIENTISTS HAVE IDENTIFIED THOUSANDS OF EXOPLANETS ORBITING OTHER STARS. But spying moons orbiting those planets has been a struggle. On October 1, 2018, researchers announced they may have just found the first of these so-called exomoons. The Kepler space telescope looked for tiny dips in a star’s brightness, which can Continue Reading

Dust grains reveal asteroid Itokawa’s age

Dust grains reveal asteroid Itokawa’s age

On June 13, 2010, Japan’s asteroid-visiting Hayabusa spacecraft earned its name (“peregrine falcon”) by divebombing through Earth’s atmosphere at 7.5 miles (12.2 kilometers) per second. As expected, the spacecraft disintegrated upon re-entry; however, a heat-shielded sample-return capsule survived the fall relatively unscathed, returning a plethora of precious dust grains collected Continue Reading