About Edge of Space Sciences (EOSS)

Edge of Space Sciences (EOSS) is a Denver, Colorado based non-profit organization that promotes science and education by exploring frontiers in amateur radio and high altitude balloons. Click "Read More" for more information.

Our organization works with educators, offering valuable opportunities to enhance their students' studies of science, technology, engineering and math (STEM) through real, hands-on experience. We provide FAA coordination, launch, tracking and recovery of the payloads. Each year, our volunteers spend thousands of hours to enable student STEM programs to reach the Edge of Space.

EOSS-360 AIAA RMS Sponsored DSST and Wheat Ridge and Northfield Launch

This flight is a single 3000g balloon for the Denver School of Science and Technology (DSST), Northfield HS, and Wheat Ridge HS. 


Flight Prediction https://www.eoss.org/predict/


Deer Trail Launch site layout.  

EOSS-358 & 359 EPIC Littleton & Colorado Space Grant Consortium Flight - Recap

Summary: Two balloons were launched on Saturday, May 4 from Deer Trail Colorado.

Colorado Space Grant Consortium Spring Launch - CANCELED

  • April 27/28 COSGC flights cancelled. New flight numbets and new flight date remain unknown at this time.
  • March 29, 2024. Updated flight plans to new flight numbers 357Lite RevA and 358Lite RevA. Old flight plans removed 

EOSS-355/356/357 Metro State University Intro2Space & CU-Boulder Gateway to Space - Recap

On Sunday, 21 April 2024, three Lite (Exempt) balloons were launched from Deer Trail School in Deer Trail, Colorado.  Weather was cloudy, with a temperature of 32 degress in light Southeast winds.

EOSS-355, the first balloon, was for Metro State University Intro2Space Program, was a 3000 gram balloon launched at 0718 (ALL TIMES MDT) and ascended to 109,842 feet altitude when it released at 0847.  It landed at 0934 near Mt Pearl, CO at 38.9567 North, -102.7625 West.

EOSS-354 NDIA Flight - Recap

On Sunday, March 17, 2024, one 2000 gram balloon was launched from Deer Trail Colorado carrying student payloads sponsored by the Rocky Mountain Chapter of the National Defense Industrial Association (NDIA  --  https://ndiarmc.org/ ). 

The payloads consisted  of 250 student experiments inside 3 Payload boxes.  These experiments were from schools in Colorado, Wyoming, Texas, Louisiana, Georgia, Pennsylvania, Arizona, Virginia and Mississippi.

EOSS-351/352/353 Evergreen HS, Westminster HS, & Golden HS Flight - Recap

On Saturday, December 2, 2023 three 1500g balloons were launched from Deer Trail Colorado, carrying payloads from three Denver area high schools.

EOSS-350 COSGC Fall Launch - Recap

The launch on November 11, 2023 from Deer Trail, Colorado was flight EOSS-350, one 3000g balloon, launch time was 6:57am. There were 24 payloads from COSGC, it was a site to see the balloon go up followed by 24 payloads covered in shiny silver tape reflecting the sun.

EOSS-348/349 MSU - Intro to Space & Littleton Schools EPIC program - Recap

Two 3,000 g balloons were launched from Deer Trail on November 4, 2023.  Both flights landing NorthEast of Kit Carson.

The Deer Trail parking lot was full of cars for the two launches. It was estimated over 100 cars and how many would follow us out to recovery?  It turned out 10 student/parent cars went out with each balloon.  Thank you to both schools for bringing coffee, donuts, juice, and snacks.  A big thank you for making Deer Creek School look spiffy after much eating, gluing, taping, weighing, and stringing  of payloads.

EOSS-347 NDIA Flight - Recap

A single 1500g balloon was launched at 8:07 am MDT on October 21, 2023 from Deer Trail School carrying student expreiments from a variety of schools. The balloon reached a height of approximately 86,000 feet and landed south of Arickaree, Colorado.

Link for EOSS member mileage reimbursement



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