Solar system
NOAA raises risk of strongest solar flares amid high sunspot activity
There is a 15 percent chance of X-class solar flares on Wednesday, and a 40 percent chance of M-class flares.
Hidden ocean on Jupiter's moon Europa may contain key ingredient for life
Europa is thought to have a hidden subsurface ocean of salty liquid water, which scientists believe may harbor the conditions suitable for life.
Solar ejection blows away tail of approaching comet
Newly discovered approaching comet C/2023 P1, or Nishimura, had its tail blown away by a coronal mass ejection on September 2.
Meteor spotted in skies over Siberia: Video
The meteor most likely burned up in the atmosphere before it reached the ground, a scientist told Russian state media.
Neptune's strange disappearing clouds mystery might have been solved
Scientists have noticed that the disappearance and reappearance of clouds on Neptune may be correlated with the sun's solar cycle.
New comet approaching Earth might soon be visible to naked eye
This comet was only discovered on August 11 by amateur astronomer Hideo Nishimura, and is getting brighter in the sky as it approaches the Earth and sun.
NASA's impending mission to $10,000 quadrillion asteroid explained
The launch of the Psyche spacecraft to its namesake asteroid is due this October, and will only arrive at its Asteroid Belt location in 2029.
Two powerful X-class solar flares just days apart cause radio blackouts
An X1.6-class solar flare was explelled from the sun on August 5, followed by an X1.5-class one on August 7, both of which caused radio blackouts.
Solar plasma explosion hits the Solar Orbiter spacecraft
The CME was detected on the far side of the sun traveling at 3.4 million mph, a speed that indicates the CME may have been very powerful.
Astronomers discover surprising similarity between Earth and Mercury
The mechanism behind the northern lights could be universal throughout our solar system.
"Cannibal" eruption from the sun may disturb Earth's magnetic field
Cannibal coronal mass ejections are when a faster-moving plume of solar plasma catches up and engulfs a slower preceding CME.
How to see the Perseids meteor shower in July and August
The shower is one of the most spectacular celestial events of the year. Here's how you can view the cosmic display in the coming weeks.
NASA's Perseverance rover discovers organic matter on Mars
The discovery has implications in the search for potential signs of life on the Red Planet, researchers said.
Asteroid bigger than Washington Monument to zoom past Earth this week
You can watch the asteroid as it approaches our planet in real-time online via a livestream provided by the Virtual Telescope Project.
Rare X-class solar flare wipes out radio signals in U.S.
The solar flare was categorized as an X1.08-class flare, making it one of the most powerful classes of flare to be ejected from the sun.
Powerful X-class solar flare causes radio blackout over U.S. : 'Kaboom!'
X-class is the most powerful type of solar flare, 1 million times stronger than a nuclear bomb.
Easily spot Jupiter and its four largest moons tonight
Skygazers will be able to see the Galilean satellites clearly if they are treated with clear skies.
Asteroid larger than Empire State Building to pass Earth on Monday
The asteroid, named 488453 (1994 XD), is due to pass the Earth at a speed of around 48,000 mph.
The asteroid that shadows the Earth
A new asteroid has been discovered orbiting the Earth, interacting only weakly with the planet in a way that classifies the object as a "quasi-moon".
Four plane-sized asteroids approaching Earth this weekend
Three of the asteroids are due to fly by our home planet at distances of around 4 million miles, while one will approach nearly as close as the moon.
New images of the sun capture "unprecedented detail"
High-definition images of sunspots on the sun's surface show the dark spots dotted with tiny pinpricks of light called umbral dots.
Huge sunspot four times the size of Earth visible without a telescope
The sunspot, named AR3310, is so large that viewers don't need magnification to see it.
Arctic Circle hit by radio blackout
A plume of solar protons spat out by the sun has accelerated towards the Earth, and were funneled down into the polar regions by our magnetic field.
Earth set for annual Halley's comet meteor shower
The Eta Aquariid meteor shower is due to peak on May 6 as the Earth passed through the particles left behind by Halley's comet centuries ago.
Asteroid about to pass as close to Earth as the moon
The asteroid, which is called 2023 HV5, will fly past the Earth on Wednesday at around 10 times the speed of a bullet being fired.
Why the northern lights are visible over U.S.
The northern lights were spotted as far south as California due to a severe G4 geomagnetic storm pummeling Earth's atmosphere and magnetic field.
Mercury appears with spectacular comet-like tail in night sky
Mercury also has a tail that streams out behind it as it gets close to the sun, but is only visible with a special filter that shows the glow of sodium.
Why a hybrid solar eclipse is so rare
The solar eclipse will appear as an annular eclipse for portions of the moon shadow's journey, and a total eclipse at others, due to the curvature of the Earth.
Could a rogue planet destroy the Earth?
Rogue planets that float freely through space without a star to orbit are very difficult for astronomers to detect.
Freezing cold cryovolcano erupts from comet
The eruption from Comet 29P/Schwassmann-Wachmann was unique, as scientists had predicted it based on the comet's brightness.

