"India has led the world in space and scientific achievements and this momentous feat by our scientists has once again made the entire nation proud," she said.
"All the scientists and supporting staff of ISRO involved and instrumental in contributing to the space science research programmes have once again honoured the vision of our forefathers who always stood to build a scientific temper for the country," she added.
Gandhi said the "illustrious accomplishment" has added one more feather in the cap of the country's hard working scientists.
(REOPENS DES5)
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Congress Vice President Rahul Gandhi also congratulated ISRO and said the country's space programme is scaling newer heights.
"Our space program continues to scale new heights! Yet another milestone achieved, proud moment for all of us. Thank you ISRO," he tweeted.
At the AICC briefing, Congress spokesperson Ajot Kumar congratulated ISRO scientists for bringing laurels to the country.