Help Shape the Future of Space Exploration

Join The Planetary Society Now  arrow.png

Join our eNewsletter for updates & action alerts

    Please leave this field empty
Blogs

Blog Archive

 

Pretty picture: Looking backward

Posted by Emily Lakdawalla on 2013/07/23 05:03 CDT | 15 comments

Here it is: the view from Saturn of our Earthly home, one and a half billion kilometers away. We see Earth and the Moon through a thin veil of faintly blue ice crystals, the outskirts of Saturn's E ring. Earth is just a bright dot -- a bit brighter than the other stars in the image, but no brighter than any planet (like Saturn!) in our own sky.

Read More »

Earth and Moon from MESSENGER

Posted by Emily Lakdawalla on 2013/07/22 05:03 CDT | 3 comments

A new picture of the Earth-Moon system from MESSENGER, taken the same day we were told to "Wave at Saturn." Updated with a neat photo taken from much closer to Earth from a similar perspective.

Read More »

Return of the Pale Blue Dot
Join the Wave at Saturn (and Mercury)!

Posted by Mat Kaplan on 2013/07/18 11:27 CDT | 4 comments

You can be part of a planetwide group photo as Cassini and MESSENGER turn their cameras Earthward on July 19.

Read More »

Dunes on Tatooine

Posted by Ralph Lorenz on 2013/07/17 01:13 CDT

The fictional world Tatooine, scene of action in the Star Wars movies, is named after a town in Tunisia, where parts of the movies were filmed. The desert backdrops against which the movies were filmed are real terrestrial landscapes, which prove to be perhaps unexpectedly dynamic.

Read More »

A rare clear day in Alaska

Posted by Emily Lakdawalla on 2013/07/12 06:00 CDT | 3 comments

NASA recently shared a gloriously detailed image of an unusual clear day in Alaska as seen from the Terra satellite.

Read More »

Stationkeeping in Mars orbit

Posted by Emily Lakdawalla on 2013/06/27 10:55 CDT | 12 comments

It had never occurred to me to think about geostationary satellites in Mars orbit before reading a new paper by Juan Silva and Pilar Romero. The paper shows that it takes a lot more work to maintain a stationary orbit at an arbitrary longitude at Mars than it does at Earth.

Read More »

One Ocean World Among Many

Posted by Jim Bell on 2013/06/03 03:53 CDT | 6 comments

I'm absolutely floored when I stop to think that our beautiful blue ocean is only one of perhaps a half dozen or more oceans on other worlds in our solar system, and only one of probably millions (or more) oceans on other Earth-like planets in our galaxy. Oceans abound!

Read More »

No Place Like Home

Posted by Bill Dunford on 2013/04/21 03:07 CDT | 6 comments

Mars and Earth share a truly striking family resemblance, but there's no mistaking which one is home.

Read More »

Messages of Wonder

Posted by Bill Dunford on 2013/03/18 04:22 CDT

Some lovely, rarely-seen images from the MESSENGER mission.

Read More »

Pretty picture: a moon transit

Posted by Emily Lakdawalla on 2013/02/21 05:52 CST | 5 comments

A reader comment inspired me to dig up an oldie but a goodie: a sequence of photos of the Moon transiting Earth, seen from a very long way away,

Read More »

A forgotten image of Earth and the Moon

Posted by Emily Lakdawalla on 2013/02/13 07:45 CST | 4 comments

While researching another story, I came across an image I don't remember ever seeing before, of a moonrise from an unexpected source.

Read More »

The Earth is a Planet: Why We Explore Space

Posted by Bill Dunford on 2013/02/11 10:50 CST

Why spend effort and scarce resources on space exploration when we have so many problems here at home? Turns out, there are some pretty good reasons.

Read More »

Browsing Landsat data is a lot easier than I thought it was

Posted by Emily Lakdawalla on 2013/02/08 05:05 CST | 2 comments

With the Landsat Data Continuity Mission scheduled to launch on Monday, there's been a lot of Tweeting about Landsat, and through one such Tweet I learned about a resource that I hadn't known existed before: the LandsatLook Viewer. This is a graphical interface to more than a decade worth of Landsat data, a tremendous resource for anyone interested in Earth's changing surface, natural or manmade.

Read More »

Galileo Messengers: Cruise to Venus, Earth, Gaspra, Earth, Ida, and almost to Jupiter

Posted by Emily Lakdawalla on 2013/02/05 08:40 CST | 2 comments

It's taken me a year to face the emotionally draining task of reading and writing about Galileo's cruise phase as chronicled in the mission's newsletters.

Read More »

Pretty picture: Landsat view of southern Greenland

Posted by Björn Jónsson on 2012/11/13 05:24 CST

This is a very large (19000 pixels square) mosaic of the fjords and glaciers of southern Greenland. I had been interested for a long time in experimenting with the processing of Earth satellite imagery just to get a comparison to the other planets.

Read More »

Hurricane Sandy: Thanks for lives saved already

Posted by Emily Lakdawalla on 2012/10/29 11:32 CDT

Today hurricane Sandy is a major threat to life and property across the west coast of the northern Atlantic ocean. I just want to give thanks in advance to all the people who have devoted their careers to making sure that Americans have sufficient warning of devastating, unstoppable weather events like this one.

Read More »

Birth of a New Moon

Posted by Emily Lakdawalla on 2012/07/05 12:01 CDT

As astronaut Don Pettit prepared for his return to Earth, he tweeted several beautiful shots from the Space Station.

Read More »

Talking Climate With Bill Nye

Posted by Mat Kaplan on 2012/07/03 04:04 CDT | 2 comments

Talk about changing climates on this world and others brought 600 people to the Boulder Theater.

Read More »

A solar eclipse - as viewed from the Moon

Posted by Emily Lakdawalla on 2012/05/28 11:19 CDT | 3 comments

A solar eclipse isn't just a spiffy sight to Earthlings; it looks pretty cool to lunar dwellers as well.

Read More »

More Evidence for Impact Origin for Colombia’s Vichada Structure

Posted by Bruce Betts on 2012/05/08 03:43 CDT

Evidence continues to pile up that the Rio Vichada structure in Colombia is indeed the largest impact structure in South America.

Read More »

Items 61 - 80 of 168  Previous123456789Next
Facebook Twitter Email RSS AddThis

Planetary Defense

An asteroid or comet headed for Earth is the only large-scale natural disaster we can prevent. Working together to fund our Shoemaker NEO Grants for astronomers, we can help save the world.

Donate

Featured Images

SpaceX CRS-8 landed booster
SES-10 static test fire
Jupiter's
Jupiter's
More Images

Featured Video

Class 9: Saturn, Uranus, and Neptune

Watch Now

Space in Images

Pretty pictures and
awe-inspiring science.

See More

Join The Planetary Society

Let’s explore the cosmos together!

Become a Member

Connect With Us

Facebook, Twitter, YouTube and more…
Continue the conversation with our online community!