2901–2920 of 6,715 results
Needles in a Starry Sky

Celestial News & Events

Halley On Fire! Orionids Peak This Week

The annual Orionid meteor shower is active all week, peaking Friday morning October 21st. If you're up before dawn, you might just see these Halley's Comet castoffs come to life.

Mars in UV

Solar System

MAVEN’s Mars: in Ultraviolet

NASA’s youngest Mars orbiter has watched clouds grow and detected an ozone accumulation on the Red Planet.

Idunn Mons thermal comparison

Solar System

More Evidence for Volcanoes on Venus

Planetary scientists haven't yet witnessed an active volcano on Venus, but a new study pinpoints a likely set of still-warm lava flows.

aldebaran occultation by Roger Hutchinson

Celestial News & Events

Moon to Cover Bright Star Aldebaran

This eye-catching occultation occurs late on October 18th (West Coast) and early on the 19th (East Coast). It's a grazing event as seen from Los Angeles and Denver.

Curiosity Selfie

Solar System

What Are Curiosity and Opportunity Up To?

As Schiaparelli prepares to land on Mars, how are the other robotic denizens of the Red Planet doing?

Ewen Whitaker

People, Places, and Events

Remembering Ewen A. Whitaker, 1922–2016

An amateur who devoted his live to chronicling the Moon, and became one of the world's most renowned lunar specialists, has died at age 94.

IRS 43's Tilted Disks

Exoplanets

Two Stars, Three Planet-forming Disks

A young pair of stars hosts three potentially planet-forming disks, and all three of them are wildly tilted with respect to each other.

EDM Lander

Solar System

Schiaparelli Lander to Touch Down on Mars

The innovative joint European Space Agency/Roscosmos Schiaparelli lander begins its three day solo journey to the Martian surface this weekend.

Astro Leagues's 2016 NYAA winners

People, Places, and Events

Meet Some Amazing Young Astronomers

This year's awards from the Astronomical League showcase some talented high-school students and astronomy clubs throw great star parties.

Cosmology

About Those 2 Trillion New Galaxies . . .

The news that astronomers find the universe has 10 times more galaxies than previously thought? There's less to this than the headlines say.

Coronal hole on October 13th

Celestial News & Events

Solar Forecasters Predict Chance of Auroras

The National Oceanic and Atmospheric Administration (NOAA) predicts a strong chance of geomagnetic activity tonight, October 13–14.

crater appears on Moon

Solar System

Space Rocks Hit the Moon Often

Observations from NASA’s Lunar Reconnaissance Orbiter reveal that the Moon is being pockmarked by meteoroids at a higher rate that previously predicted.

Green Bank Telescope

Professional Telescopes

Green Bank Observatory Goes Independent

Green Bank is celebrating its 60th birthday by seceding from the National Radio Astronomy Observatory.

convective M dwarf

Astrobiology

Proxima Centauri Has Sun-Like Cycle

Observations confirm that the closest star to our solar system has a regular magnetic cycle similar to our Sun.

Orbit of Kuiper Belt object 2014 UZ224

Solar System

New Object Vies for Kuiper Belt Record

Right now 2014 UZ244 lies nearly 14 billion kilometers away, ranking it third among the most distant objects known in the Kuiper Belt.

Dione in front of Saturn

Solar System

Does Dione Have a Subsurface Ocean?

A new analysis suggests that a subsurface ocean might lie deep beneath the crust of Saturn’s moon Dione.

2013 Astronomy Day celebration in Boston

Celestial News & Events

Fall Astronomy Day: Saturday, October 8th!

Amateur astronomy clubs, planetariums, science museums, and parks celebrate Astronomy Day twice a year.

Erupted plumes on Europa?

Solar System

Hints of Geysers Erupting from Europa

Newly released Hubble images show what appear to be towering jets of water coming from Jupiter's moon Europa.

Rosetta on Comet 67P's surface

Solar System

Rosetta's Grand Finale

The historic mission to explore a comet ends in dramatic fashion on September 30th.

Evening sky toward west in mid-October

Celestial News & Events

Tour October's Sky: Planets in Transition

This month is your last chance to catch Saturn in the evening sky. But Mars is still hanging around, and Venus is climbing higher each evening.