Exoplanet hunters have found thousands of planets, most in orbit near their host stars, but relatively few alien worlds have been detected that float freely through the galaxy like so-called rogue planets, not tied to any stars. Many astronomers believe these planets are more common than we know, but our planet-hunting techniques have not been up to the task of locating them.
A planetary survey, called Microlensing Observations in Astrophysics ( MOA), scanned the central bulge of our Milky Way galaxy from 2006 to 2007. He used a 1.8-meter telescope at the Mount John University Observatory in New Zealand and a technique called gravitational microlensing.
In this method, a planet-sized body is indirectly identified as it passes in front of a more distant star, causing the star to illuminate. The effect is like a funhouse cosmic mirror, or magnifying glass: the light from the background star is deformed and amplified, becoming brighter.
Using the latest technology, the Nancy Grace Roman Space Telescope from NASA will conduct an investigation to discover many more exoplanets using powerful techniques available for a wide-field telescope.
A planetary survey, called Microlensing Observations in Astrophysics ( MOA), scanned the central bulge of our Milky Way galaxy from 2006 to 2007. He used a 1.8-meter telescope at the Mount John University Observatory in New Zealand and a technique called gravitational microlensing.
In this method, a planet-sized body is indirectly identified as it passes in front of a more distant star, causing the star to illuminate. The effect is like a funhouse cosmic mirror, or magnifying glass: the light from the background star is deformed and amplified, becoming brighter.
Using the latest technology, the Nancy Grace Roman Space Telescope from NASA will conduct an investigation to discover many more exoplanets using powerful techniques available for a wide-field telescope.