By NASA/JPL-Caltech - Cropped from: PIA22093: TRAPPIST-1 Planet Lineup - Updated Feb. 2018, Public Domain.

How Long Does It Take to Make a Planet? Webb’s Latest Discovery Extends the Cosmic Clock

March 6, 2025
This artist's concept shows what the isolated planetary-mass object SIMP 0136 could look like based on recent observations from NASA's James Webb Space Telescope and previous observations from Hubble, Spitzer, and numerous ground-based telescopes. Researchers used Webb's NIRSpec (Near-Infrared Spectrograph) and MIRI (Mid-Infrared Instrument) to measure subtle changes in the brightness of infrared light as the object completed two 2.4-hour rotations. By analyzing the change in brightness of different wavelengths over time, they were able to detect variability in cloud cover at different depths, temperature variations in the upper atmosphere, and changes in carbon chemistry as different sides of the object rotated in and out of view. This illustration is based on Webb's spectroscopic observations. Webb has not captured a direct image of the object. Credit: NASA, ESA, CSA, and Joseph Olmsted (STScI)

The Planet That Roams Alone: Webb’s Stunning Discovery of SIMP 0136’s Chaotic Atmosphere

March 5, 2025
WD 2226-210 and the Helix Nebula (Labeled). In about 5 billion years, our sun will run out of fuel and expand, possibly engulfing Earth. These end stages of a star’s life can be utterly beautiful as is the case with this planetary nebula called the Helix Nebula. Credit: X-ray: NASA/CXC/SAO/Univ Mexico/S. Estrada-Dorado et al.; Ultraviolet: NASA/JPL; Optical: NASA/ESA/STScI (M. Meixner)/NRAO (T.A. Rector); Infrared: ESO/VISTA/J. Emerson; Image Processing: NASA/CXC/SAO/K. Arcand

A Dead Star’s Deadly Grip: How a White Dwarf May Have Torn a Planet to Shreds

March 4, 2025
T-Coronae-Borealis-nova. Source: lanouvellerepublique.fr

The Blaze Star Could Explode This March—Here’s How to See It

March 4, 2025
Earth. Credits: pexels

How a 15-Million-Year-Old Galactic Journey May Have Shaped Our Planet’s Climate

March 3, 2025
This artist’s impression shows an example of a rogue planet with the Rho Ophiuchi cloud complex visible in the background. Rogue planets have masses comparable to those of the planets in our Solar System but do not orbit a star, instead roaming freely on their own. Image Credit: ESO/M. Kornmesser/S. Guisard

Beyond the Solar System: The Shocking Discovery of Free-Floating Planets

March 2, 2025
This artist’s impression shows two tiny but very dense neutron stars at the point at which they merge and explode as a kilonova. Such a very rare event is expected to produce both gravitational waves and a short gamma-ray burst, both of which were observed on 17 August 2017 by LIGO–Virgo and Fermi/INTEGRAL respectively. Subsequent detailed observations with many ESO telescopes confirmed that this object, seen in the galaxy NGC 4993 about 130 million light-years from the Earth, is indeed a kilonova. Such objects are the main source of very heavy chemical elements, such as gold and platinum, in the Universe.

Neutron Stars, Black Holes, and the Most Extreme Cosmic Rays—A Game-Changing Discovery

March 2, 2025
An artist’s conception shows Firefly Aerospace’s Alpha rocket during stage separation. (Firefly Illustration)

Firefly Aerospace’s Race to the Moon: Can Blue Ghost Make History?

March 2, 2025
The Hubble Space Telescope examined 36 dwarf galaxies around the Andromeda Galaxy and measured their star formation histories. Andromeda is the bright spindle-shaped object at image center. The most prominent dwarf galaxy is M32 (NGC 221), a compact ellipsoidal galaxy that might be the remnant core of a larger galaxy that collided with Andromeda a few billion years ago. Image Credit: NASA, ESA, Alessandro Savino (UC Berkeley), Joseph DePasquale (STScI), Akira Fujii DSS2

Something Strange Is Happening in Andromeda’s Dwarf Galaxies—And It’s Changing Our Understanding of Star Formation

March 1, 2025
Credits: NASA

A Dwarf Galaxy Is Spewing Stars—Is a Hidden Supermassive Black Hole to Blame?

March 1, 2025
This month, four bright planets greet you in the early evening, just after sunset, according to a JPL spokesperson. (Shutterstock)

Planet Parade 2025: Seven Worlds Align—Here’s How to Watch

February 27, 2025
Mars seen before, left, and during, right, a global dust storm in 2001. Credit: NASA/JPL/MSSS

Not Just Rust: The Surprising Mineral That Gives Mars Its Color

February 26, 2025
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