The TESS mission has organized a working group to investigate “sector stitching” effects, and invites interested community members to participate.

"Sector stitching" refers to a common challenge in TESS data where a source’s measured flux is observed to be discontinuous across sector boundaries. The TESS mission is currently investigating …

Welcome to the first update about Sector 1751, TESS’s special observation of interstellar comet 3I/ATLAS!

Sector start and end times: Sector 1751 began 2026 January 15 around 6:00 UTC and ends 2026 January 22 around 12:00 UTC. This is an ecliptic pointing, with the comet’s …

Over the summer, we announced that 22 proposals requesting funding via TESS Cycle 8 were being held in a “selectable” state, pending clarification of budget and programmatic priorities. This week, we are inviting 14 of the 22 proposals to submit Phase 2 budget proposals to NASA. Eight proposals will continue …