to “dirty snowballs.” When a comet approaches the Sun, its surface begins to vaporize, forming a glowing coma (a cloud of gas and dust) and a tail that always points away from the Sun due to solar radiation and solar wind. What is a comet’s structure? A...

In standard models of planetary evolution, stars and their orbiting planets originate from the same collapsing cloud of gas and dust. This shared origin typically ensures that the resulting planets orbit in the same direction as the star’s rotation,...

Astronomers have discovered a dense object 16,300 light-years away that appears to be capturing a massive star in its earliest stage of formation. Astronomers have peered deep into the “Dragon Cloud,” a dense, frigid nebula located approximately 16,300...

Astronomers have discovered a rare baby planet less than 1 million years old, providing a unique glimpse into the earliest stages of planetary formation. Astronomers have confirmed the existence of Elias 2-24 b, a massive infant world that currently...

A 2026 outburst reshaped Comet 220P/McNaught, painting it green as astrophotographers snapped stunning shots over Namibia. Astrophotographers Gerald Rhemann and Michael Jäger captured a vivid view of Comet 220P/McNaught on August 8, 2026, when the...

A century-long analysis of high-altitude ice reveals a steady descent driven by atmospheric contraction. Ghostly ice clouds shining at the edge of space are slowly sinking toward Earth, according to an extensive new analysis of more than a century of...

New Hubble observations suggest comet 41P may have slowed down, stopped, and started spinning the opposite way after its close pass by the Sun in 2017. Comets may look calm in telescope images, glowing softly against the dark sky. But in reality, they...

NASA captures the stunning Great Orion Nebula, a vast stellar nursery where newborn stars light up and reshape the cosmic gas clouds that formed them. Located just 1,350 light-years away, the Great Orion Nebula serves as one of our galaxy’s most...

Scientists have created the sharpest map ever of dark matter, revealing how this invisible substance shaped galaxies, stars, and even the conditions needed for life. When you look at the night sky, it feels complete. Stars shine, galaxies glow, and...

Astronomers have discovered a rare exoplanet orbiting in the opposite direction of its host star, challenging everything we know about planetary formation. Astronomers have uncovered a celestial oddity that defies the standard models of planetary...

New Dark Energy Camera image captures Earth’s nearest stellar nursery, with newborn stars lighting swirling clouds and a distant globular cluster. Stellar nurseries are regions where interstellar gas and dust collapse under gravity to ignite new stars....

The James Webb Space Telescope has detected an interstellar visitor hiding within a comet’s icy grains, challenging everything we know about space rocks. The James Webb Space Telescope has uncovered a distinct chemical fingerprint in the interstellar...

immense scale differences in astronomy—a local fragment from our solar system intersecting the line of sight to a cloud of gas and dust many light‑years away. NASA Showcases Rare Sky Alignment in APOD Feature The image was posted by NASA as part of its...

The Hubble Space Telescope has captured a stunning image of N44, a massive cosmic superbubble carved by stellar winds in the Large Magellanic Cloud. Deep within the constellation Dorado, roughly 160,000 light-years from our own solar system, lies a...

As Saturn shifts, the mysterious debris rings of Fomalhaut reclaim the spotlight. Discover why this lonely autumn star continues to fascinate astronomers. The night sky is currently undergoing a subtle realignment as a familiar celestial pairing begins...

Astronomers finally solve the decades‑old mystery of the giant structure once thought to erupt from the Milky Way’s core. A team of astronomers has finally clarified the nature of a luminous bubble that for four decades was thought to be a colossal...

A powerful new space telescope designed to map 1.5 billion galaxies has unexpectedly captured a mysterious, unidentified streak in our cosmic backyard. The European Space Agency’s Euclid space telescope has unexpectedly expanded its scientific legacy...

Astronomers have discovered unexpectedly high levels of deuterated methanol near a young star, challenging current models of organic chemistry in space. Astronomers have achieved a milestone in astrochemistry by confirming the presence of a rare, fully...

he was able to track the object across five separate image sets. Further analysis revealed a coma—the hallmark fuzzy cloud of gas and dust that signals a comet undergoing active sublimation as it approaches the solar system’s warmth. Euclid captures...

a complex matrix of chondrules—microscopic, spherical grains that originated as molten droplets within the swirling cloud of gas and dust surrounding the nascent Sun. The “H” classification denotes high iron content, explaining why the stone initially...