161 Posts

5d fema
Normal Federal Emergency Mgmt Agency
fema Hi, it’s Yari again! If you saw the video we posted here earlier today, you already know that space weather hitting Earth can really distort our magnetosphere. What you might not know, is that this distortion is responsible for one of the most beautiful natural phenomena we have -- the aurora! (Also known as the Northern or Southern lights.

Aurora form when energetic particles flow down magnetic field lines of the magnetosphere and strike air particles in the atmosphere. Normally, aurora are seen close to the poles, since that’s where Earth's magnetic field lines touch down. But during a geomagnetic storm, the aurora can sometimes be seen closer to the equator.

I was born in Puerto Rico and the aurora was even seen there in 1859 during one of the biggest space weather events ever recorded, called the Carrington Event. In addition to aurora, that event also caused telegraphs to spontaneously send messages due to the electric currents being induced in the ground! #YariFEMATakeover

NASA Heliophysics isn’t on Instagram, but you can follow us on Twitter @ NASASunEarth
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5d fema
Video Federal Emergency Mgmt Agency
fema Hi, it’s Yari from @NASA again! We've talked about a few different things the sun can throw our way, but what happens when those things actually get to Earth? This video shows a model of what happens when coronal mass ejections (and all the magnetic fields they carry) reach near-Earth space.

We're going to get into some detailed physics here, but stick with me! Earth is the sphere in the center of the picture. A lot of people think of the space around Earth as being completely empty, but that's not exactly true. There are some particles out there and Earth is also surrounded by a giant magnetic bubble, called the magnetosphere. The lines around Earth represent the magnetic fields that point from south to north. The vertical lines on the left represent the magnetic fields coming off the sun, moving toward Earth.

Sometimes the two sets of magnetic fields interact and not much happens. But when a coronal mass ejection is moving fast and its magnetic field lines are pointing north to south (in the opposite direction of Earth's) the collision can be intense. For one thing, the connected magnetic field lines can allow particles from the sun to funnel into our space. These particles provide radiation that can batter our satellites or even trip up electronics onboard the satellite. Second, the coronal mass ejection’s magnetic fields can set off oscillations in Earth's magnetosphere, which we call a geomagnetic storm.

Extreme geomagnetic storms can set off unexpected electric currents in utility grids on Earth, which can impact or harm the transformers. This has happened only a few times in our history, including during a geomagnetic storm in 1989 that caused the utility grid in Quebec, Canada, to shut down for nine hours.

One of the reasons we work to better understand what causes geomagnetic storms is so that space weather forecasters at @NOAA can give power utilities and emergency management agencies enough advance notice to anticipate the impacts and protect their grids. At @NASA, our space weather analysts also send notifications to our missions to protect our technology in space. #YariFEMATakeover
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6d fema
Normal Federal Emergency Mgmt Agency
fema Hi, it’s Yari from @NASA continuing my space weather takeover! Sunspots are the cradle for a lot of the solar behavior that affects us here on Earth. They are one of the only solar features that can be seen in visible light – though of course you can still only see them with special telescopes or eclipse glasses, because you should never look at the sun directly. Sunspots are the most magnetically active regions on the sun, and they tend to be complex regions too. It's these beds of roiling solar material and magnetism that can lead to the giant explosions we here at NASA see as flares and coronal mass ejections. One of the things space weather scientists like me are still working on is figuring out the exact conditions that set off these explosions. #YariFEMATakeover

Follow NASA Heliophysics on Twitter @ NASASunEarth and learn more about sunspots at nasa.gov/sunearth
6d

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1w fema
Normal Federal Emergency Mgmt Agency
fema Yari from @NASA here again, talking more about space weather! Solar flares are one type of event that can cause space weather. A solar flare is a huge, hot release of light and energy that happens when magnetic field lines on the sun reconnect.

This is an image of a solar flare captured by NASA's Solar Dynamics Observatory. It shows a solar flare in three wavelengths of light: visible, 171 angstroms, and 304 angstroms (an angstrom is roughly the diameter of an atom and it’s the measurement we use to define the size of light waves). Each wavelength shows a different temperature of material, so by looking at many different wavelengths, we get a better idea of exactly what's going on during a flare.

Solar flares travel at the speed of light, so by the time we see them all that light and energy have made it to Earth and are beginning to cause space weather effects. The main thing flares can do is interrupt radio communications near Earth for as long as they're happening.

Solar flares release a lot of energy - for some flares, the energy would be enough to power New York City for years if we could collect it! After we see a huge flare, we'll go back over the data to compare it to our models and to help us better understand what produces them. #YariFEMATakeover

More information about solar flares can be found at nasa.gov/sunearth

Follow NASA Heliophysics on Twitter @ NASASunEarth
1w

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1w fema
Normal Federal Emergency Mgmt Agency
fema Hi! I’m Dr. Yaireska Collado-Vega (I usually go by Yari) a @NASA scientist, and I am taking over @FEMA’s Instagram this week to talk about space weather. Space weather is what we call the interactions between the sun and Earth's space environment (very different from Earth's weather with its sunny days or hurricanes). Sometimes, extreme space weather can affect our technology on Earth, which is why emergency management agencies like FEMA are tuned into space weather forecasts 24/7.

This picture is me looking at some of the images of the sun our satellites have collected from space. Space weather begins at the sun with things like extreme solar flares and huge eruptions of solar material called coronal mass ejections that can cause emissions of fast moving particles called solar energetic particles. These particles have different technological effects at Earth – like interfering with GPS or radio communications. I'll be talking more about that all week – but rest assured that radiation from these eruptions is blocked by Earth's atmosphere, so humans on the ground can't be hurt.

Here at @NASAGoddard, we test and validate models for space weather that try to show how events at the sun may affect Earth. To make our models better, we check our simulations against what actually happens and improve them. We work closely with our friends over at @NOAA who are in charge of providing all of the space weather forecasts, alerts and warnings for the nation. They use the most robust models to monitor space weather and warn people when technology might be affected. I’ll be back later today with more info about space weather! #YariFEMATakeover NASA Heliophysics isn’t on Instagram, but you can follow us on Twitter @ NASASunEarth
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izsincere_1300 #amazing
#Repost @energy
・・・
It’s #SpaceWeek at Energy.gov! All week long, we’re exploring #energy and #science on the #cosmic frontier, starting with this clip from @NASA’s Solar Dynamics Observatory (SDO). #SDO has been capturing images of the #sun 24/7 since 2010, giving us an unprecedented view of our restless #star’s flares, eruptions and ever-shifting magnetic field. Scientists at the Energy Department’s Lawrence Livermore National Laboratory played a big role in developing the optics that make these breathtaking images possible. Stay tuned for more #SpaceWeek, and be sure to join our “Energy of Star Wars” Google+ Hangout this Friday, June 12, at 2 p.m. ET! (LINK IN BIO) | Video courtesy of #NASA. #LLNL #space #solar #solarflare #heliophysics #astronomy #StarWars
3w

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energy It’s #SpaceWeek at Energy.gov! All week long, we’re exploring #energy and #science on the #cosmic frontier, starting with this clip from @NASA’s Solar Dynamics Observatory (SDO). #SDO has been capturing images of the #sun 24/7 since 2010, giving us an unprecedented view of our restless #star’s flares, eruptions and ever-shifting magnetic field. Scientists at the Energy Department’s Lawrence Livermore National Laboratory played a big role in developing the optics that make these breathtaking images possible. Stay tuned for more #SpaceWeek, and be sure to join our “Energy of Star Wars” Google+ Hangout this Friday, June 12, at 2 p.m. ET! (LINK IN BIO) | Video courtesy of #NASA. #LLNL #space #solar #solarflare #heliophysics #astronomy #StarWars 3w

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padiol If you are in #NYC this #weekend and want to hear about the sun and #heliophysics, #NASA #Goddard #scientist #AlexYoung (The Sun Today: #Solar #Facts and #SpaceWeather) and video producer #GennaDuberstein will be around on Sat. night at http://bit.ly/1AArvpD and Sun.day at http://bit.ly/1AArtOq to talk about all things #helio, the #sun and #Solarium. http://www.nasa.gov/s #Science #Astronomy #SDO #SOHO #spacecraft #solarsystem #star #cosmos #astrophysics #ultracosmic #contemporary #foreXart #wsf 1mon

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wondersciencetv This is the surface of the Sun. #Heliophysics #NASA #Sun #WONDERsciencetv 1mon

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Normal Danielle Parsons

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avf_sonder "The Sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do." -Galileo Galilei
avf_sonder
#nature
#thesun
#heliophysics
#galileogalilei
#philosophizing
#meditation
#contemplatinglife 💭
#regardeleciel
2mon

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space_nrd420 X2 #SolarFlare Today... Emerging #sunspotAR2339 unleashed an intense X2-class solar flare on May 5th at 22:15 UT // A pulse of UV radiation and X-rays from the flare caused a strong #radioblackout over the Pacific side of Earth #spaceweather #solarflares #solarenergy #sun #solar #solarpower #soulpower #cme #heliophysics #solarsystem #soulsystem 2mon

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adityaabdilahyusuf Teleskop Radio @LAPAN Tanjungsari, Kabupaten Sumedang.
#teleskop #radio #LAPAN #indonesia #astronomy #heliophysics
2mon

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leidykate What a treat to get to talk about my work with great scientists! #tess2015 #heliophysics #adrenalinerush #gradschoolawesomeness 2mon

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adityaabdilahyusuf Teleskop Surya Observatorium Bosscha

Eits jangan salah ya, kita bisa mengamati bintang di siang hari loh.. Terutama bintang utama di Tata Surya kita, Matahari.
Banyak fenomena di Matahari yang dapat diamati dengan teleskop surya ini, seperti: kromosfer matahari (prominensa, flare, filamen, dll), medan magnet di permukaan matahari, sun spot (bintik matahari), dll.
Astronom juga bisa ngamat di siang hari (y).
Pengamatan Matahari penting untuk lebih memahami fenomena yang terjadi di Matahari, agar kita dapat memahami hubungan fisis antara sang surya dengan bumi kita.

#astronom #professional #astronomers #star #sun #solar #astronomy #astronomi #heliophysics #Observatorium #Bosscha #observatory #observation #u_phy #lapan #ganteng #bandung #lembang #liburan #praktikum #mahasiswa #itb #institutteknologibandung #fisika #matahari #registax
2mon

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spatula_la Just learning about #heliophysics with my 3 year old. Haha. This kid is totally frozen watching this documentary. #3DSun 2mon

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adityaabdilahyusuf Praktikan matkul Fisika Matahari. (y)
#bosscha #heliophysics #praktikum
2mon

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josealfredolerma Dr. Holly Gilbert, Chief of Heliophysics Science Division at @NASA, at today's sessions on space weather. #Heliophysics #spaceweather #tropicalwx #nasa 3mon

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