Results tagged “Sun”

Proba-2 Views The Sun's Corona

This snapshot of our constantly changing Sun catches looping filaments and energetic eruptions on their outward journey from our star's turbulent surface.

Sun Emits Significant Solar Flare

The sun emitted a significant solar flare, peaking at 12:22 p.m. EDT on March 11, 2015.

The magnetic field of the Sun plays a crucial role in shaping the heliosphere -- the domain of the Sun -- by accelerating the solar wind into a pair of jets

SDO Sees Giant Filament on the Sun

A dark line snaked across the lower half of the sun on Feb.10, 2015, as seen in this image from NASA's Solar Dynamics Observatory, or SDO.

Counting sunspots over time helps in knowing the activity of our star but the two indices used by scientists disagree on dates prior to 1885.

Magnetic Field Lines on the Sun

Scientists have developed a way to produce models of where the magnetic field lines are several times each day.

Coronal Loops Reveal Magnetic Dance

Magnetic Dance: Solar material traces out giant magnetic fields soaring through the sun to create what's called coronal loops.

SDO Collects Its 100-Millionth Image

On Jan. 19, 2015, at 12:49 p.m. EST, an instrument on NASA's Solar Dynamics Observatory captured its 100 millionth image of the sun.

Severe Space Weather Warning

NOAA has issued a space weather warning of the potential for a geomagnetic K-index of 7 or greater. Severe to extreme space weather conditions may result. Resulting aurora may be seen as low as Pennsylvania to Iowa to Oregon.

Sun As Seen in High-Energy X-Rays

For the first time, a mission designed to set its eyes on black holes and other objects far from our solar system has turned its gaze back closer to home, capturing images of our sun.

Sun Emits a Mid-Level Flare

On Dec. 4, 2014, the sun emitted a mid-level solar flare, peaking at 1:25 p.m. EST.

Loss of Contact with STEREO Behind

Communications with the STEREO Behind spacecraft were interrupted on October 1, 2014 immediately after a planned reset of the spacecraft performed as part of a test of solar conjunction operations.

SDO Sees a Mid-Level Solar Flare

The sun emitted a mid-level solar flare, peaking at 5:40 p.m. EST on Nov. 3, 2014. NASA's Solar Dynamics Observatory, which watches the sun constantly, captured an image of the event.

NASA's Interface Region Imaging Spectrograph (IRIS) has provided scientists with five new findings into how the sun's atmosphere, or corona, is heated far hotter than its surface, what causes the sun's constant outflow of particles called the solar wind, and what mechanisms accelerate particles that power solar flares.

NASA's Solar Dynamics Observatory, or SDO, which watches the sun 24 hours a day, has observed this gigantic filament for several days as it rotated around with the sun.

On Sept. 30, 2014, a sounding rocket will fly up into the sky - past Earth's atmosphere that obscures certain wavelengths of light from the sun -- for a 15-minute journey to study what heats up the sun's atmosphere. This is the fourth flight for the Very high Angular Resolution Ultraviolet Telescope, or VAULT, will launch from the White Sands Missile Range near Las Cruces, New Mexico.

Solar Explosions Inside a Computer

The shorter the interval between two explosions in the solar atmosphere, the more likely it is that the second flare will be stronger than the first one.

IRIS Footage of X-class Flare

On Sept. 10, 2014, NASA's newest solar observatory, the Interface Region Imaging Spectrograph, or IRIS, mission joined other telescopes to witness an X-class flare - an example of one of the strongest solar flares -- on the sun.

New Clues to Determining the Solar Cycle

Approximately every 11 years, the sun undergoes a complete personality change from quiet and calm to violently active. The height of the sun's activity, known as solar maximum, is a time of numerous sunspots, punctuated with profound eruptions that send radiation and solar particles out into the far reaches of space.

NASA's twin Van Allen Probes will celebrate on Saturday two years of studying the sun's influence on our planet and near-Earth space.

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