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June 5, 2020

Joanne says: Jordi is my miracle grandson. While his doctor says he is ready for a Safta visit (that’s me) – I have to know I’m not an asymptomatic disaster before I spend time with him.

June 4, 2020

Yesterday there is a close inferior conjunction of Venus, which is a technical term for meaning that Venus has an apparent close approach to the Sun. It's not a full transit, but we don't need transits to see it, because we have a coronagraph at MLSO.

Recent News

Photographic image of the book cover to "The Sun: A Very Short Introduction" by Phil Judge
May 19, 2020

Philip Judge is a senior researcher in physics at the High Altitude Observatory. Education and outreach has been a major focus and passion during his scientific career. He has influenced and encouraged many young scientists to pursue careers in solar physics.

Photograph of Mausumi Dikpati, senior scientist at HAO
March 17, 2020

Mausumi Dikpati is a senior scientist at HAO. She studies the dynamics between Rossby waves and solar activity such as flares and coronal mass ejections (CMEs).

Publication Highlights

Graphic image of intensity and polarization data surrounding the current sheet formed on Sept 10 2017
June 2, 2020

Philip Judge states that the interpretation of emission lines formed in large astrophysical plasmas such as the solar atmosphere faces many challenges. Relatively simple line-ratio estimates of physical parameters, while appealing, are heavily laden with assumptions.

Graphic image of the comparison of 135.6 nm emissions
June 2, 2020

We report the first results of a global ionosphere/thermosphere simulation study that self-consistently generates large-scale equatorial spread F (ESF) plasma bubbles in the post-sunset ionosphere.

Photograph of TEC in 2015
May 15, 2020

Summary or Abstract: The strength and structure of the Earth's magnetic field is gradually changing. These changes do not only affect the difference between the geographic and magnetic pole, which we have to consider when we hike in higher latitude regions.

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.


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).


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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