4 votes

What are the twinkling stars in the New Horizons Arrokoth approach?

I got a still from the video and uploaded it to nova.astrometry.net. This successfully identified the field and provided an astrometrically calibrated image. The two stars are: The fainter, large ...
ProfRob's user avatar
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3 votes

What element drives pulsations in T Tauri Stars?

T-Tauri stars are not pulsational variables. Their variability, on timescales of minutes to decades, is associated with: spots and magnetically active regions on their surfaces; with variability of ...
ProfRob's user avatar
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2 votes

Tracking variable stars?

The AAVSO (American Association of Variable Star Observers) organises and tracks many variable stars. For example you can see the latest observations of T CrB (is this your "blaze star"?). ...
James K's user avatar
  • 122k

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