EnglishAlexander Gerst is on Twitter (X) as @Astro_Alex, with 1,047,809 followers and 5,562 posts. It has been on X since October 2011, an account age of 15 years.
Engagement
Early reading. We have captured 1 original post for this account, below the 8 we require before treating a median as settled. The numbers above describe what we have seen so far, not a finished profile of the account.
A typical post picks up 268 interactions against 1.0M followers, an engagement rate of 0.026%. Posts are seen about 12K times each, and 2.18% of those impressions turn into an interaction. That is about 1.17% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.03 posts a day over the last 30 days, though only 3% of days saw any activity at all.
Measured over 1 original post from a 30-day window, last computed on October 25, 2026.
Full engagement reportFollower growth
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Bio
European of German nationality, @ESA astronaut, geophysicist, volcanologist, explorer. Lived one year in space where he served as Commander of ISS Expedition 57
Notable followers
The biggest accounts in our directory following @Astro_Alex.
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Alexander Gerst on Twitter (X) - frequently asked questions
- What is the Twitter handle for Alexander Gerst?
- Alexander Gerst posts on Twitter (X) as @Astro_Alex. The profile is at x.com/Astro_Alex, and the View on X button at the top of this page opens it.
- How many followers does Alexander Gerst have on Twitter?
- Alexander Gerst (@Astro_Alex) has 1,047,809 followers on Twitter (X). The count is refreshed continuously from public data.
- When did Alexander Gerst join Twitter?
- Alexander Gerst joined Twitter (X) in October 2011. The @Astro_Alex account is 15 years old. Searches for Alexander Gerst age often mean a personal age, which we do not publish. The figure here is the account age only.