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Science Wire | Oct 21, 2014

New 3D map of the cosmic web

A team of astronomers has created the first three-dimensional map of the adolescent universe, just 3 billion years after the Big Bang.

Screen Shot 2014-10-20 at 9.08.14 AM
Science Wire | Oct 20, 2014

Video: Solar eclipse on October 23

Weather permitting, almost everyone in North America will be able to see the partial solar eclipse this Thursday.

Comet Siding Spring (lower left) passes Mars on October 19, 2014.  Photo by Damian Peach.  Used with permission.
Science Wire | Oct 20, 2014

Best photos: Comet Siding Spring sweeps past Mars

A sight never seen before in recorded history … an encounter between Mars and a close-passing comet on October 19, 2014.

Comet/Mars encounter on Oct. 19, via NASA.
Blogs | Oct 19, 2014

Comet Siding Spring’s near-miss of Mars was October 19

The close pass of Comet Siding Spring to Mars was exciting! Closest approach was October 19. Watch for photos from the event here at EarthSky.org.

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Science Wire | Oct 19, 2014

Video: Comet Siding Spring’s close encounter with Mars

Here’s a 2-minute video on the comet’s October 19 near-miss of Mars, and how orbiting spacecraft will evade onslaught of dust particles from the comet.

Artist's impression of the Milky Way. Its hot halo appears to be stripping away the star-forming atomic hydrogen from its companion dwarf spheroidal galaxies.  Image credit: NRAO/AUI/NSF
Science Wire | Oct 16, 2014

Milky Way strips nearby galaxies of star-forming hydrogen

Astronomers have discovered that our nearest galactic neighbors are devoid of star-forming gas, and that our Milky Way is to blame.

Science Wire | Oct 16, 2014

What are super-Earths made of?

Astronomers struggle to learn about super-Earths – bigger than our Earth, smaller than Neptune – the most common type of planet found by the Kepler spacecraft.

Science Wire | Oct 15, 2014

Alright! Hubble finds potential targets for Pluto spacecraft

After a long search at the solar systems’ fringes, scientists say they have three possible targets for the New Horizons spacecraft after its July 2015 Pluto flyby.

Science Wire | Oct 15, 2014

Spacecraft catches Mars atmosphere in act of escaping

Earth’s atmosphere is leaking into space, too, but only very, very slowly. Meanwhile, Mars is thought to have lost much of its atmosphere already.

Science Wire | Oct 13, 2014

Milky Way’s dark matter half what we thought?

Australian astronomers say our Milky Way galaxy has only half the dark matter we thought it did. If so, it explains the shortage of Milky Way satellites.

Science Wire | Oct 12, 2014

Active moon volcanos in geologically recent times

Last volcanic activity on moon thought to be a billion years ago. Now small lava flows on moon’s dark plains suggest activity as recently as 50 million years ago.

Earth and moon from Mercury's orbit
Science Wire | Oct 11, 2014

MESSENGER spacecraft sees lunar eclipse from Mercury

The MESSENGER spacecraft, now orbiting Mercury, caught the images to make this movie of last Wednesday’s lunar eclipse. See Earth and moon from Mercury!

Meteor seen during 2013 Eta Aquarid shower by Justin Ng
Tonight | Oct 11, 2014

EarthSky’s meteor shower guide for 2014

Next up … the Orionid meteor shower on the night of October 20-21. It’s a grand year for this shower!

Science Wire | Oct 09, 2014

Mapping the weather on an extreme exoplanet

Scientists using the Hubble Space Telescope have completed the first map of temperature and water vapor on a “hot Jupiter,” an exoplanet called WASP 43b.

Total lunar eclipse composite image by Fred Espenak
Tonight | Oct 09, 2014

October 2014 guide to the five visible planets

Orionid meteor shower night of October 20-21. Comet Siding Spring just misses Mars on October 19. A partial solar eclipse on October 23. Plus Mars, Saturn, Mercury and Jupiter!

Close-up of the boulder Cheops as it casts a long shadow on the surface of comet 67P/Churyumov-Gerasimenko. Cheops has a size of approximately 45 meters and is the largest structure within an a group of boulders located on the lower side of the comet’s larger lobe. The image was obtained on September 19th by Rosetta’s scientific imaging system OSIRIS from a distance of 28.5 kilometers. One pixel in this image corresponds to 50 centimeters.  Image via ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA
Science Wire | Oct 09, 2014

First named feature on a comet!

Scientists have named one of the largest boulders on Rosetta’s comet after an Egyptian pyramid.

Solar eclipse November 3, 2013 by Ken Christison
Blogs | Oct 08, 2014

Dates of lunar and solar eclipses in 2014 and 2015

If you missed the beautiful October 8, 2014 total eclipse of the moon, here’s what’s ahead.

Lunar eclipse illustration courtesy of Luc Viatour
FAQs | Oct 07, 2014

What is a Blood Moon?

A lunar tetrad – four total lunar eclipses in a row – began on the night of April 14-15. The next one will be on the night of October 7-8.

Deborah Byrd
Science Wire | Oct 07, 2014

Join EarthSky’s Deborah Byrd at online viewing of total lunar eclipse

Slooh.com invites stargazers worldwide for an online viewing of the total eclipse of the moon on October 8. Deborah Byrd will be on hand as a special guest.

Photo by Anthony Lynch
Blogs | Oct 07, 2014

Is the October 8, 2014 full moon a supermoon?

There’s disagreement on whether the October 8, 2014 full moon should be called a supermoon. If it is one, it’s a super Hunter’s Blood Moon … in eclipse.

Photo credit: Oliver Floyd
Blogs | Oct 06, 2014

How often do 7 eclipses occur in 365 days?

It’s rare to have 7 eclipses in a calendar year. It’s less rare to have 7 eclipses in 365 days. There are 7 eclipses in 365 days 29 times in the 21st century!