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Artist’s impression of the Ulysses spacecraft

Solar System

Measuring Solar Eruptions with a Rare Alignment

New analysis of a coronal mass ejection detected by the alignment of two spacecraft reveals that it experienced erosion and restructuring as it traveled.

Sunspots at solar minimum vs. maximum

Solar System

The Sun’s Activity Cycle Is Stabilizing

Solar Cycle 25 is here, and forecasts suggest the next decade of the Sun’s activity will mimic the last one — halting a 40-year trend.

The Sun's full disk

Solar System

European Solar Orbiter Takes Closest-ever Images of the Sun

The first images to be released from the European Space Agency’s Sun-imaging spacecraft show intriguing “campfires” that could help explain a solar mystery.

Solar flare

Solar System

New Evidence for Nanoflares?

Astronomers have spotted weak bursts of low-frequency radio emission coming from all over the Sun.

Stargazer's Corner: Adventures Under the Night Sky

95 Sunrises Along the Columbia Riverbank

Margaret Greenwood explores the changing location of sunrises throughout the year.

The Sun vs. Sun-like Stars

Solar System

How Lazy Is the Sun?

Astronomers studying hundreds of Sun-like stars were surprised to find that most of them are more active than the Sun. Why is the Sun different?

Solar Eclipse in 1900

Astronomy and Society

Amateur Filmmaker Captured Solar Eclipse — in 1900

In 1900, a man named John Nevil Maskelyne filmed a solar eclipse — the first of its kind.

Dunn Solar Telescope

Professional Telescopes

Sunspot Solar Observatory Reopens After Mysterious Shutdown

After a 10-day lockdown to cooperate with a criminal investigation, Sunspot Solar Observatory is back to looking at the Sun.

Parker Solar Probe launch

Astronomy in Space with David Dickinson

NASA's Parker Solar Probe Launches to "Touch the Sun"

The unique Parker Solar Probe launched on Sunday, August 12th, set to fly faster and come closer to the Sun than any spacecraft before it.


Explore the Night with Bob King

Quest for the Green Flash

If you like sunrises and sunsets, look for the green flash, a phenomenon that happens more often that you think.

Explore the Night with Bob King

Walking with Arcturus

Stars are time machines that can transport us into the past or future. They can also illuminate our own personal journeys, as Arcturus did for me one night.

Orbital Path Podcasts with Michelle Thaller

Orbital Path Podcast: Journey to the Sun

Nicki Viall, a heliophysicist at Goddard Space Flight Center, shares her excitement over the Parker Solar Probe — the spacecraft that will allow scientists to "touch" the Sun.

Celestial News & Events

Giant Sunspots, Flares Presage Arrival of Solar Storm

Two big, naked-eye sunspot groups are putting on a splendid show this week. We're also in the crosshairs for a strong geomagnetic storm and possible auroras.

cutaway of Sun

Stellar Science

Sun's Waves Reveal Core's Spin

Solar astronomers may have finally detected gravity waves in our star’s core, revealing that the Sun’s central region rotates about four times faster than the outer layers.

Spotless Sun

Stellar Science

Is Our Sun Slowing Down in Its Middle Age?

The Sun, now halfway through its life, might be slowing its magnetic activity, which could lead to permanent changes in the sunspots and auroras we see.

Magnetic manifestations

Celestial Objects to Observe

Fun in the Sun: A White-Light Guide to Our Nearest Star

We examine the fascinating solar phenomena that anyone with a small scope and safe solar filter can see, whether the Sun's in eclipse or not.

Parker Solar Probe

Solar System

NASA's Parker Solar Probe to Touch the Sun

NASA's Parker Solar Probe, set to launch in 2018, will be humanity's first effort to "touch the Sun," revolutionizing our understanding of the Sun's corona, the solar wind, and the greater heliosphere.

Solar System

Scientists Recreate Space Weather of 400 Years Ago

Scientists are studying 400-year-old data to predict space weather in the coming decades — and it seems that future may hold fewer Northern Lights.

Celestial News & Events

The Spotless Sun

The Sun has been unusually quiet lately. Since the start of 2017, only a single tiny sunspot has made a brief appearance on the solar disk.

Low Sun, Long Shadows and Icy Atmospherics

Explore the Night with Bob King

Swing Low, Sweet Sun: It's Solstice Time

Daylight ebbs to a minimum on Wednesday's winter solstice, but not for long. The very next day, the Sun turns back north and the cycle of light begins again.