HAO Sun Earth Lab

[NSF National Center for Atmospheric Research @NCAR_Science]

What on 🌎 is space weather? Join NCAR scientist Stan Solomon this Thursday for a talk about the physics and chemistry behind space weather, storms, and the aurora!

Register today for the event on 11/19: https://t.co/MkoNSCkzbA

#spaceweather #NSFstories

[HAO Sun Earth Lab @HAOSunEarthLab]

Meet our new director, Holly Gilbert!

[NSF National Center for Atmospheric Research @NCAR_Science]

🎊 We are thrilled that Holly Gilbert will be the next director of our High Altitude Observatory. Welcome Holly! 🎉

https://t.co/UWCxAj5EmW

[Sky & Telescope @SkyandTelescope]

Two astronomers captured the silhouette of Venus as it passed in front of the solar corona.
https://t.co/DJPuO0xOXO

[NSF National Center for Atmospheric Research @NCAR_Science]

While a transit of Venus across the Sun's face is incredibly rare (the next is not due until 2117), the planet occasionally travels through the corona, as it did in early June.

A coronagraph at NCAR's observatory on Hawaii captured the uncommon passage.

https://t.co/4l2DTWjKrp

[NSF National Center for Atmospheric Research @NCAR_Science]

What time is it?

Solar storm o'clock on the dot.

Scientists have created an elegant Sun clock that shows that solar activity starts and stops on a much more precise schedule that many researchers thought.

https://t.co/NELHFQqowb

@swmcintosh @leamonrj #AGUpubs @warwicknewsroom

[HAO Sun Earth Lab @HAOSunEarthLab]

HAO scientist Scott McIntosh (@swmcintosh ) contributed to this new way of looking at solar cycle timing.

[HAO Sun Earth Lab @HAOSunEarthLab]

When will it be flare time on the Sun? “By devising a new, regular 'sun clock', researchers have found that the switch on and off of periods of high solar activity is quite sharp, and are able to determine the switch on/off times.” https://t.co/x0zqBm75n9

[HAO Sun Earth Lab @HAOSunEarthLab]

@RyanJFrench1 Thank you for your earlier tweet about this! FYI, these movies are from two-minute averages that give better signal to noise than what is available from the MLSO website.

[HAO Sun Earth Lab @HAOSunEarthLab]

HAO's K-Cor coronagraph instrument at Mauna Loa Solar Observatory captured a rare close approach of Venus to the Sun as seen from Earth. Venus can be seen as a small black dot above the north pole as it transits the faint solar corona in these images of polarized white light.

[HAO Sun Earth Lab @HAOSunEarthLab]

See more images and data at the MLSO web site: https://t.co/AWybqhsbm5

[Dr. Ryan French @RyanJFrench]

Almost 8 years ago exactly, Venus passed across the face of the Sun, in what would be the last Venus transit of our lifetimes. Yesterday we had a ‘near miss’, with Venus passing less than a solar radii above the Sun’s northern edge. (Image credit, MLSO K-Cor) 1/6

[HAO Sun Earth Lab @HAOSunEarthLab]

HAO scientist @MausumiDikpati presented on how Magnetic Rossby Waves in the Sun's interior shape and drive space weather to our friends at @NWSSWPC . See the recorded presentation here: https://t.co/5XQvL4tz4k

[Scott McIntosh @swmcintosh]

@MausumiDikpati presenting on how [Magnetic] Rossby Waves in the Sun's interior shape and drive space weather to our friends at @NWSSWPC ! Awesome!!!! @NCAR_Science

[HAO Sun Earth Lab @HAOSunEarthLab]

Mauna Loa Solar Observatory observer Allen Stueben along with @whearobotics kids are producing Personal Protective Equipment with 3D printers, while wife Mary makes cloth masks. Great job Stuebens, thanks for helping the community! @somegoodnews https://t.co/GNAExYKDgE

[Scott McIntosh @swmcintosh]

Terminator Watch: The southern activity band definitely growing in strength and clarity - the band is lagging but definitely getting more pronounced. Both centered on +/- 30 degrees, but south has more spread. #Terminator2020

[Ricky Egeland @rickyegeland]

Every Friday at @HAOSunEarthLab we have donuts and coffee with colleagues & visitors. Today we kept the tradition going with a virtual donuts on Google Hangouts. Definitely nice to see some familiar faces after a week at home.

[HAO Sun Earth Lab @HAOSunEarthLab]

Hey Northern Colorado: HAO scientists will be in Fort Collins tomorrow (Feb 29) at the Colorado State "Little Shop of Physics." Stop by our table to learn about solar magnetism, space weather, and more! https://t.co/UirwJG4ADV

[HAO Sun Earth Lab @HAOSunEarthLab]

Michael Knölker, engaged as always, questions Oskar von der Lühe (right), at the symposium held in his honor at the NCAR Mesa Laboratory.

[HAO Sun Earth Lab @HAOSunEarthLab]

Today HAO begins a celebration of the work and achievements of former director and now Senior Scientist Emeritus Michael Knoelker with a symposium "From Solar Physics to Exoplanets" held in his honor.
Info & Agenda: https://t.co/FF4JqTy9hD
LIVE webcast: https://t.co/pX83JjiYHz