We present cloud-tracking results from Venus nightside images with velocity errors approaching 1 m/s (rms). The cloud-tracking scheme focuses on 1) reducing the errors associated with Venus disk registration and 2) modeling cloud feature trajectories over a succession of images. Venus disk registration errors are reduced to within 0.25 pixels with

We compare Venus dayside cloud top winds from Akatsuki UVI images to contemporaneous winds in the lower clouds retrieved on the night side using IRTF/SpeX 2.3 µm images. From Nov 19 to Dec 6, 2018, we obtained daily images of the night side of Venus with SpeX at 1.74, 2.3 and 5.1 µm, and spectral images cubes of the disk from 0.7 to 2.5 µm. On Nov

Aims: We aim to study the magnetic field in solar spicules using high-resolution spectropolarimetric observations in the Ca II 8542 Å line obtained with the Swedish 1-m Solar Telescope. Methods: The equations that result from the application of the weak field approximation (WFA) to the radiative transfer equations were used to infer the line-of

We analyse the physical properties of 121 SNR ≥ 5 sub-millimetre galaxies (SMGs) from the STUDIES 450 μm survey. We model their UV-to-radio spectral energy distributions using MAGPHYS+photo-z and compare the results to similar modelling of 850 μm-selected SMG sample from AS2UDS, to understand the fundamental physical differences between the two

The S2 stream is a kinematically cold stream that is plunging downwards through the Galactic disc. It may be part of a hotter and more diffuse structure called the Helmi stream. We present a multi-instrument chemical analysis of the stars in the metal-poor S2 stream using both high- and low-resolution spectroscopy, complemented with a re-analysis

Cold dark matter (CDM) simulations predict a central cusp in the mass distribution of galaxies. This prediction is in stark contrast with observations of dwarf galaxies that show a central plateau or "core" in their density distribution. The proposed solutions to this core-cusp problem can be classified into two types. One invokes feedback