Enjoying EarthSky? Subscribe.

211,976 subscribers and counting ...

Sky wheeling around Polaris, the North Star.

Does the North Star ever move?

It’s a symbol for constancy, but, if you took its picture, you’d find that the North Star makes its own little circle around the sky’s north pole every day.

This graphic overlays Martian atmospheric temperature data as curtains over an image of Mars taken during a regional dust storm. The temperature profiles extend from the surface to about 50 miles (80 kilometers) up. Temperatures are color coded, ranging from minus 243 degrees Fahrenheit (minus 153 degrees Celsius) where coded purple to minus 9 F (minus 23 C) where coded red.

Patterns in Mars’ seasonal dust storms

Dust lofted by Martian winds links directly to temperatures in Mars’ atmosphere. The temps are key to finding the patterns of the storms.

ISS, as captured by Dave Walker

How to spot ISS in your sky

Check out the International Space Station in your night sky the next time it flies over. NASA’s Spot the Station program is easy, and it works!

Possible iridium flare via Simon Waldram

I saw a flash in the night sky. What is it?

We can’t always say for sure what you saw in the night sky. But it might have been a flare from an iridium satellite.

This new radio image of Jupiter is averaged from 10 hours of VLA data, so the fine details seen in the other maps are smeared here by the planet’s rotation. Image via astronomers Imke de Pater, Michael H. Wong, Robert J. Sault.

Peering beneath Jupiter’s clouds, via radio

Astronomers used the Very Large Array in New Mexico to create a new radio map of Jupiter, revealing what lies deep below Jupiter’s cloudtops.

Artist's concept via Harvard-Smithsonian Center for Astrophysics

Universe’s first life on diamond planets?

Astronomers propose a search for a theoretical kind of planet known as carbon planets, aka diamond planets. They say such planets might have been habitable.

Comet C/2013 X1 (PanSTARRS) captured on June 7, 2016 by Efrain Morales of the Sociedad de Astronomia del Caribe

Comet visible in binoculars, nearly closest

Comet C/2013 X1 (PanSTARRS) isn’t visible to the eye, but binoculars can pick it up. Charts and other info that can help you spot the comet in the coming weeks!

Image from live webcam - April 26, 2016 - of the James Webb Space Telescope, now under construction at Goddard Space Flight Center.

Watch the Webb get its instruments

This new space telescope is expected to revolutionize our view of the cosmos, much as its predecessor the Hubble Space Telescope did.

asteroid-2016-LT1-cp

Asteroid 2016 LT1 sweeps close June 7

The asteroid – discovered June 4 – is about 20 feet wide and will pass within about 100,000 miles (153,000 km) this afternoon according to clocks in North America.

Scientists from NASA's New Horizons mission used state-of-the-art computer simulations to show that the surface of Pluto's heart-shaped Sputnik Planum region is covered with churning ice "cells." These icy cells are geologically young, less than a million years old. The scene above is about 250 miles (400 km) across. It uses data from New Horizons' July 14, 2015 flyby of Pluto. Image via NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute)

Pluto’s heart: Icy and alive

Computer simulations show that the heart-shaped Sputnik Planum region on Pluto is covered with icy, churning, convective “cells,” less than a million years old.