Astrobiology50- Page

Planets emerge from the dense disk of gas and dust encircling young stars. — NASA Pebble accretion is the leading theory for the formation of exoplanets more massive than the

Sentinel-3 captured this image of Earth’s biggest iceberg, A23a, on 5 April 2025. Larger image The Ocean and Land Colour Instrument on Copernicus Sentinel-3 captured this image of Earth’s biggest

A, C 3D view of the sheet unit overlying the fragmented breccia unit at the eastern rim of the Ritchey crater, HiRISE image on HRSC DEM (architected from Fig. 1C,

A) Sequence alignment tree of the 45 biochemically tested RNAs. Clustering of the RNAs by sequence alignment coincided by the RNA’s use of specific DNA cofactors as coded by different

SPHEREx — NASA Launched on March 11, NASA’s SPHEREx space observatory has spent the last six weeks undergoing checkouts, calibrations, and other activities to ensure it is working as it

Periods and mass ratios for planets detected using different methods. Data points show all exoplanets catalogued on 30 July 2023 (41) and are color-coded by detection method (see legend). The

Schematic of topography on an icy satellite. Equations shown for the evolution of Newtonian viscous ice with shell thickness H. The parameters and equations shown on the figure are described

Val Finlayson (left) and Paulo Galvan recovering rock samples from a dredge from a 2013 expedition. Credit: Val Finlayson. Geologists led by the University of Maryland and the University of

Harvesting Lettuce at Kennedy Space Center Space Systems Processing Facility Image credit: NASA/Kim Shiflett Inside a laboratory in the Space Systems Processing Facility at NASA’s Kennedy Space Center in Florida,

MK0 − Teff plane (upper left left) and Gaia photometry color-magnitude diagram (upper right, bottom left and bottom right) for stars in APOGEE DR17. The local sample of dwarfs is