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The solar corona photographed by Miloslav Druckmüller from Brno University of Technology in the Czech Republic during the 2020 total eclipse over Argentina
September 16, 2021

After almost 8 decades, astronomers still debate the reasons why the Sun and sun-like stars must possess coronae. Philip Judge re-examines the problem and compares it to that of a detective trying to find the lead pipe or smoking gun at the scene of a murder.

Satellite with spectrograph instrumentation hovering over the earth
September 7, 2021

Since 2017, HAO has provided scientific support and analysis for NASA's Global-scale Observations of the Limb and Disk (GOLD). This mission includes a ultraviolet imaging spectrograph that flies on a commercial communications satellite in geostationary orbit taking images of the Earth's thermosphere and ionosphere.

Publication Highlights

Magnetic field lines
September 16, 2021

The author reviews why, after almost 8 decades, we still have a coronal heating problem.

3D magnetic eld evolution of an erupting pseudostreamer
August 13, 2021

In this study, we present a magnetic conguration of an erupting pseudostreamer observed on April 19, 2015 on the Southwest limb embedding a prominence cavity. The eruption resulted in a relatively wide CME with a round front and prominence core intersected by a sharp plume.

migrating semidiurnal tide amplitude in zonal wind
August 13, 2021

Specified Dynamics Whole Atmosphere Community Climate Model with thermosphere-ionosphere eXtension (SD-WACCMX) simulations are used to investigate the solar migrating semidiurnal tide (SW2) around September equinox at middle to high latitudes in the Northern Hemisphere.

MLSO Latest Images

CoMP Coronal Intensity

The COronal Multi-channel Polarimeter (CoMP) observes the Fe-XIII emission line at 1074.7 nm to measure the coronal magnetic field and obtain plasma density and motion in the low corona from ~1.03 to 1.5 solar radii.

GET CoMP DATA

K-Cor White Light Corona

Designed to study the formation and dynamics of coronal mass ejections and the evolution of the density structure of the low corona, K-Cor records the polarization brightness (pB).

GET K-COR DATA

K-Cor (radially graded filter)

K-Cor image with a normalized radially graded filter (nrgf) to maximize image contrast, especially in the outer field.

These data are ideal for measuring positions of coronal structures such as CMEs and helmet streamers.

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