SHABAR Archives - Astrobiology

Left: Image of the Sun with Earth superimposed on the same scale. Upper-right: Radial-velocity time-series of the Sun (green points), obtained with the HARPS-N solar telescope (Dumusque et al., 2021), when compared with the expected signature of an Earth-like planet orbiting a Sun-like star (red curve). Lower-right: simulated spurious signature of an absorption spectrum of an atmosphere-less Earth-like planet centered in the sodium line (blue curve), as caused by unaccounted center-to-limb variations. The observed signal has a magnitude level similar to the expected absorption signature of the atmosphere of an Earth-like planet. These plots illustrate the challenges for the detection and characterisation of Earth-like planets orbiting other suns. Image sources: NASA SDO and ESO/M. Kornmesser

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

PoET: The Paranal Solar ESPRESSO Telescope

by Keith CowingMay 17, 2025May 17, 2025

The detection and characterisation of other “Earths”, orbiting other suns, is a bold objective of present-day astrophysics.