April 18, 2026 — National Aeronautics and Space Administration (NASA), High Earth Orbit (HEO) Transiting Exoplanet Survey Satellite (TESS) Begins Next Year in Space #2 Space telescope for NASA Explorers program, designed to search for exoplanets using the transit method in an area 400 times ...
July 23, 2026 — National Aeronautics and Space Administration (NASA), High Earth Orbit (HEO) Chandra X-ray Observatory Begins Next Year in Space NASA spacecraft in extended mission phase reaches 27th full year / begins 28th year of operations in space; instruments able ...
October 19, 2026 — National Aeronautics and Space Administration (NASA), High Earth Orbit (HEO) Interstellar Boundary Explorer (IBEX) Begins Next Year in Space NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this ...
April 18, 2027 — National Aeronautics and Space Administration (NASA), High Earth Orbit (HEO) Transiting Exoplanet Survey Satellite (TESS) Begins Next Year in Space Space telescope for NASA Explorers program, designed to search for exoplanets using the transit method in an area 400 times ...
July 23, 2027 — National Aeronautics and Space Administration (NASA), High Earth Orbit (HEO) Chandra X-ray Observatory Begins Next Year in Space NASA spacecraft in extended mission phase reaches 28th full year / begins 29th year of operations in space; instruments able ...
October 19, 2027 — National Aeronautics and Space Administration (NASA), High Earth Orbit (HEO) Interstellar Boundary Explorer (IBEX) Begins Next Year in Space NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this ...
October 19, 2028 — National Aeronautics and Space Administration (NASA), High Earth Orbit (HEO) Interstellar Boundary Explorer (IBEX) Begins Next Year in Space NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this ...
October 19, 2029 — National Aeronautics and Space Administration (NASA), High Earth Orbit (HEO) Interstellar Boundary Explorer (IBEX) Begins Next Year in Space NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this ...
October 19, 2030 High Earth Orbit (HEO) Interstellar Boundary Explorer (IBEX) Begins Next Year in Space NASA spacecraft mapping boundary between the Solar System and interstellar space surpasses another full year in space; launched on this ...