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Exoplanet Detection

All articles tagged with #exoplanet detection

astronomy1 month ago•9 min saved

Why Andromeda's Glow Hides Its Planets: The Physics of Extragalactic Detection

While the Andromeda galaxy is visible to the naked eye due to the combined light of over a trillion stars, detecting an Earth-like planet within it remains impossible with current technology. The planet would appear 10 billion times fainter than its host star and separated by only 1.3 microarcseconds, a gap far smaller than the resolution limits of the James Webb Space Telescope. Direct imaging requires a hypothetical 100-kilometer aperture, while indirect methods like microlensing offer limited statistical insights but no atmospheric data.

via Space Daily|

#andromeda-galaxy #astronomical-magnitude #astronomy

science2 months ago•10 min saved

Jupiter’s Pull Makes the Sun Wobble: The Sun–Jupiter Barycentre Lies Just Beyond the Sun’s Surface

Jupiter and the Sun orbit a common centre of mass called the barycentre; at Jupiter’s average distance this barycentre sits about 742,000 km from the Sun’s centre, roughly 46,000 km beyond the Sun’s visible surface, meaning Jupiter does not orbit a fixed Sun but both bodies move around a shifting balance point. This concept helps explain planetary motion and underpins the radial-velocity method used to detect exoplanets by observing stellar wobbles.

via Space Daily|

#barycentre #exoplanet-detection #radial-velocity

space-exploration2 years ago•17 min saved

"25 Years of Exoplanet Hunting: Rethinking the Search for Earth 2.0"

Over the past 25 years, exoplanet research has evolved from knowing fewer than 30 exoplanets to over 5,000 today. Despite the significant increase in discoveries, finding an Earth-like planet remains elusive. The field has seen major milestones, such as the launch of the Kepler Space Telescope and the discovery of the Trappist-1 system. Future missions like the Nancy Grace Roman Space Observatory and the Ariel Space Mission aim to further our understanding of exoplanets and their potential to harbor life.

via Space.com|

#earth-20 #exoplanet-detection #exoplanets