English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We processed images taken with the Hubble Space Telescope (HST) toinvestigate any morphological features in the inner coma suggestive of apeculiar activity on the nucleus of the interstellar comet 2I/Borisov. The comashows an evident elongation, in the position angle (PA) ~0-180d direction,which appears related to the presence of a jet originating from a single activesource on the nucleus. A counterpart of this jet directed towards PA ~10d wasdetected through analysis of the changes of the inner coma morphology on HSTimages taken in different dates and processed with different filters. Thesefindings indicate that the nucleus is probably rotating with a spin axisprojected near the plane of the sky and oriented at PA ~100d-280d, and that theactive source is lying in a near-equatorial position. Subsequent observationsof HST allowed us to determine the direction of the spin axis atRA=17h20m+/-15d and Dec = -35d+\-10d.

Interstellar Comet 2I/Borisov exhibits a structure similar to native Solar System comets