Air & Space/Smithsonian magazine's 2014 Photo Contest ends September 30, 2014, at 12:00 a.m. Eastern Standard Time (EST). By submitting an entry, each contestant agrees to the rules of the contest and states that they are 18 years old or older.

Who may enter:
Photographers who are 18 years old or older—except for individuals affiliated with the Smithsonian Institution, including employees, emeriti, Regents, trustees, interns, volunteers, fellows, research associates and their immediate families (children, siblings and spouses) and others living in their households—are eligible. Photographers who have not had a photograph published in the magazine during the past year (May 2013 to May 2014) are eligible. Air & Space will determine winners’ eligibility in its sole discretion.

What to enter:
Four contest categories are drawn from subjects of special interest to Air & Space:

Civilian—Photographs of any aircraft or spacecraft, vintage or modern; everything from homebuilts to rockets to aerobatic craft to airliners.

Astronomy—Whether it's a photograph of the moon shot through your camera lens, or the Orion nebula seen through your backyard telescope, any celestial objects will qualify

Military—Images of airplanes, helicopters, or UAVs—in any category from combat to cargo—currently operated or operated in the past by any armed service.

People & Planes—Portraits—Images of pilots or enthusiasts with the airplanes they love.

Finalists from these four categories will be posted on our website starting in December 2014, and visitors will vote for their favorites for the Reader's Choice prize.

Photographs must have been shot by the entrant on or after January 1, 2011.

Cropped photos are eligible in all categories. We do not accept digitally or otherwise enhanced or altered photos. Minor adjustments, including spotting, dodging and burning, sharpening, contrast and slight color adjustment or the digital equivalents, are acceptable for all four categories. If the judges determine that a photographer has altered his or her photo, they reserve the right to disqualify it.

For a photo in which a person is recognizable, you must secure a model release from the subject or, in the case of a minor, the subject’s parent or guardian, and provide it to Air & Space upon request. A sample release can be downloaded here.

Photographs that have won any other contests are not eligible. We define winning as having won a grand prize or 1st, 2nd, or 3rd place overall. Photos that violate or infringe upon another person's rights, including but not limited to copyright, are not eligible.

How to enter:
Please submit photographs and requested information on-line through our website at airspacemag.com/photocontest/entry. We do not accept photographs submitted through the mail. Submit no more than seven (7) photographs per category. We do not accept more than one contestant per e-mail address.

High-quality scans of non-digital photographs are acceptable. Digital photographs should be taken at the highest resolution possible. Use the online entry form on our website. Complete a separate form for each photo submitted. Photographs must be in a .jpeg, .jpg or .gif format. Files submitted may not be larger than 5Mb. The 40 finalists will be asked to submit a high-resolution file or an original negative, print or slide. Original negatives, prints, or slides will be returned to finalists.

The Smithsonian Institution reserves the right to disqualify incomplete entries and/or contestants who are unable to submit, upon request, a high-resolution photograph of at least 300 dpi at 3,000 pixels on the longest side or an original photo negative, print or slide.

Air & Space may collect a photograph’s metadata upon entry.

By entering the contest, entrants grant the Smithsonian Institution, and those authorized by the Smithsonian, a royalty-free, worldwide, perpetual, non-exclusive license to display, distribute, reproduce and create derivative works of the entries, in whole or in part, in any media now existing or subsequently developed, for any educational, promotional, publicity, exhibition, archival, scholarly and all other standard Smithsonian purposes. Any photograph reproduced will include a photographer credit as feasible. The Smithsonian Institution will not be required to pay any additional consideration or seek any additional approval in connection with such uses.

Entry deadline:
All entries must be received through the Air & Space magazine website by 12 a.m. Eastern Time on September 30, 2014.

Judging of the annual contest will be conducted by the editors of Air & Space. Winning photographs will be announced on airspacemag.com in spring 2015.

Air & Space will notify the winner via the contact information provided at the time of entry; Air & Space may disqualify anyone who fails to respond to the notification within five business days.

We will select 10 finalists per category. Four category winners will be selected, one for each category. The grand prize winner will be chosen from 40 finalists.

The 40 finalists will be notified of their status by December 1, 2014 and their entries will appear on our website on December 1, 2014. At that time, the public can vote on our website for one readers’ choice winner from the 40 finalists. The reader’s choice winner will be revealed online in spring 2015.

The contest is void where prohibited or restricted by law. The Smithsonian Institution reserves the right to cancel the contest or modify these rules at its discretion. In the event of a dispute regarding the winners, the Smithsonian Institution reserves the right to award or not award the prizes in its sole discretion. The Smithsonian Institution reserves the right to disqualify any entrant whose entry or conduct appears in any way to: inhibit the enjoyment of others; tamper with the competition; violate these rules; infringe on the rights of third parties; or act in an unsportsmanlike or disruptive manner. Decisions of the Smithsonian Institution are final.

Please do not contact us about the status of entries or judging.

Prizes: Air & Space will award six prizes, as follows:

Grand Prize: $500

Category Winners:
The winners of each of the four categories will receive $100.

Readers' Choice:
The winner of the online Readers’ Choice award will receive $100.

One cash prize per person; winners may receive additional noncash prizes. Winners must sign a release and license, declaration of eligibility, and will be responsible for paying any taxes they may owe on a prize.