[NASA] APOD: 2026 July 29 – Psyche Receives Gravity Assist from Mars

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APOD

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3. APOD: 2026 July 29 – Psyche…

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APOD

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

Psyche Receives Gravity Assist from Mars

Explanation: Solar System bodies make deep space exploration more fuel efficient! 

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 shows 

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 gaining speed and changing its trajectory with minimal fuel spent due to a 

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 from Mars in May 2026. Mars has an average orbital speed of almost 87,000 km/h (54,000 mph) around the Sun. Its orbital motion and its gravity allowed Mars to pull Psyche along with it, increasing the spacecraft’s speed. Gravity assists have been used since 1959’s 

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 to allow for spacecraft (

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, 

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) to reach farther than they could with fuel alone. This assist helped the Psyche spacecraft on its journey to the Psyche asteroid, which it will reach in 2029. While passing Mars, the spacecraft tested instruments that will analyze the asteroid’s composition and magnetic field. This is the first mission to an asteroid 

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, an essential building block for planets, rather than rock or ice.

Find dark skies and look up this August to witness 

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 uninhibited by the Moon!

Tomorrow’s picture: a red Sun

Date	July 29, 2026
Credit	NASA/JPL-Caltech/****/True Story Films
Authors & editors:	Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti, Keighley Rockcliffe
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