Lightnews — Scholar-powered news

South Pole Telescope @sptelescope.bsky.social · 3d

Picture of the #sunrise behind SPT and @BICEP_Keck in the Dark Sector from a few weeks ago by SPT winterover Sim Bash #southpole #Antarctica @NSF @doescience

1 5

South Pole Telescope @sptelescope.bsky.social · 5d

The South Pole Observatory (SPO) collaboration meeting is underway today and tomorrow at UChicago! SPO is a collaboration between the South Pole Telescope and BICEP collaboration!

7

South Pole Telescope @sptelescope.bsky.social · 6d

Our winterovers are trying to find new ways to enjoy the still rising #sunrise. Here is a picture of them from last week trying to find some space for a lawn chair by the #southpole to catch some rays! @NSF

2 8

South Pole Telescope @sptelescope.bsky.social · 17d

After being a little cloudy for the first few days after #sunrise, the winterovers are finally starting to see a little bit of #Sun at the #southpole! Pic by winterover Sim Bash! @NSF

3 31

South Pole Telescope @sptelescope.bsky.social · 21d

This weekend was official #sunrise at the #southpole! Which happens at the autumn equinox. Unfortunately, the weather was very overcast, as you can see from this picture (credit: winterover Sim) during the official sunrise day! #whiteout @NSF @NOAA #Antarctica

2 13 120

South Pole Telescope @sptelescope.bsky.social · 27d

SPT-3G 1500d D1 MCMC Chains are now available on
@NASA_LAMBDA
lambda.gsfc.nasa.gov/product/spt/...

2

South Pole Telescope @sptelescope.bsky.social · 27d

NOAA scientist Ian Crocker on top of the atmospheric monitoring tower at the #southpole (Pic by Kevin Leung).
@noaa.gov
(formerly the US Weather Bureau) have been monitoring weather there since January 1957! #Antarctica

2 7

South Pole Telescope @sptelescope.bsky.social · Sep 5

Picture from winterover Sheryl Seagraves. The view from station out to the Dark Sector. Getting much brighter outside about 2-weeks before #sunrise. The red "night" lights from the telescope are becoming less visible against the brightening sky. #Antarctica @NSF

5 15

South Pole Telescope @sptelescope.bsky.social · Sep 1

Getting closer to #sunrise at the #southpole, with official sunrise still nearly three weeks away. Winterover Sim capturing a picture of the horizon behind the ceremonial South Pole with his rubber duck on top. #Antarctica

2 13 120

South Pole Telescope @sptelescope.bsky.social · Aug 25

SPT winterover Sim Bash attempting to play #chess outside at the #southpole during the annual Pole #Olympics, in -30 deg F temps and 30 knot winds. Sim unfortunately reigned after too many pieces blew away. Pic by Zach.

1 5 10

South Pole Telescope @sptelescope.bsky.social · Aug 19

Nice article describing the devastating impact of the President's Budget on the US Antarctic science program: www.scientificamerican.com/article/u-s-...

U.S. Researchers May Never Probe Deep into Antarctica’s ‘Doomsday Glacier’ Again Without This Ship

The National Science Foundation will stop operating the Nathaniel B. Palmer icebreaker and slash polar science funding by 70 percent, devastating Antarctic research

www.scientificamerican.com

3 9

South Pole Telescope @sptelescope.bsky.social · Aug 19

A group of winterovers, including SPT's Karia Dibert, posing in front of the #southpole marker (pic by Kevin Leung). The long exposure helps to see signs of the #sunrise at Pole, but with the stars overhead there will still be some decent night sky viewing. @NSF

1 6

South Pole Telescope @sptelescope.bsky.social · Aug 18

It's still about a month away from official #sunrise at the #southpole, but they are starting to see signs of the Sun on the horizon! Picture by winterover Zeke Mills from the deck on the station! @NSF #southpole

17 140

South Pole Telescope @sptelescope.bsky.social · Aug 11

Another picture from winterover Zach Tejral of SPT observing a couple weeks ago, with some nice #aurora and the #milkyway just overhead. #Antarctica #southpole @NSF

2 10

South Pole Telescope @sptelescope.bsky.social · Aug 9

Picture from Winter Site Manager Zach Tejral of the Dark Sector Lab (DSL), which hosts the BICEP-3 experiment, and the South Pole Telescope! #ANTARCTICA @NSF @doescience #nsfunded #doefunded

3 12 110

South Pole Telescope @sptelescope.bsky.social · Aug 4

New SPT-3G constraints on early dark energy: "combining with DESI ... we get fEDE=0.071+0.035−0.038 at 68% CL and a weak preference for AEDE over ΛCDM. this shift is a manifestation of the discrepancy present between DESI and CMB experiments in ΛCDM" arxiv.org/abs/2507.23355

2

South Pole Telescope @sptelescope.bsky.social · Jul 27

Quick picture by SPT winterover Sim Bash on their way out to the telescope, with the red glow from the station lights in the background, and some nice #aurora overhead! #Antarctica @NSF

4 9

South Pole Telescope @sptelescope.bsky.social · Jul 7

The SPT winterovers recently hosted an open house and tour of the telescope. Since SPT is 1-km from station, many winterovers don't make it out often, so it's nice to have open houses to help learn about the science they are supporting! Pic by Kevin Leung @NSF @doescience

7

South Pole Telescope @sptelescope.bsky.social · Jul 7

It's a couple weeks late, but South Pole recently celebrated mid-winter at the #southpole. Mid-winter is a big milestone for the winterovers, who are spending a year at the South Pole. Attached is the official mid-winter photo, and dinner announcement from this season!

1 9

South Pole Telescope @sptelescope.bsky.social · Jul 1

SPT/SPT-3G collaboration meeting taking place this week at
@UChicago! Great to see everyone and having great discussions about all the ongoing science analyses of SPT data! @NSF @doescience #Antarctica

8

South Pole Telescope @sptelescope.bsky.social · Jun 30

Photo by Kevin Leung. SPT winterovers watching #aurora at the "End of the World", the unofficial end of the extent of the South Pole station infrastructure footprint. #southpole @NSF

3 11

South Pole Telescope @sptelescope.bsky.social · Jun 26

Tonight at 530pm in Harold Washington Library #Chicago, SPT scientist and former winter over Dr Matt Young is giving a free public lecture, learn about the science of SPT and what its like to live/work at the South Pole #Antarctica!
@UChicago t.co/uHlpPlchRA

https://chipublib.bibliocommons.com/events/67fd819c7374ee901ddad542

t.co

4

South Pole Telescope @sptelescope.bsky.social · Jun 25

SPT-3G D1 Webinar: CMB TT/TE/EE power spectra and cosmology from 2019-2020 observations from SPT-3G Main Field - Now Live!!! youtu.be/TRJ5sfAwnao
@NSF @doescience @UChicago
#NSFfunded #DOEfunded #Antarctica

SPT-3G D1: CMB power spectra and cosmology from 2019 and 2020 observations of the SPT-3G Main field

YouTube video by South Pole Telescope

youtu.be

3 12

South Pole Telescope @sptelescope.bsky.social · Jun 24

There will also be public Q&A session on Thursday, June 26 at 1pm CDT (2pm EDT, 11am PDT, 6pm UTC) hosted by the Cosmology from Home team. See this website (cosmologyfromhome.com/spt-2025) for details. #NSFunded #DOEfunded #Antarctica

Discussion of New Results from SPT-3G – Cosmology from Home

cosmologyfromhome.com

1 3

South Pole Telescope @sptelescope.bsky.social · Jun 24

On Wed, June 25, the SPT collaboration will release major new results from SPT-3G, via a pre-recorded webinar at 9.30am CDT on youtube youtube.com/@southpolete..., with the paper released at Noon CDT, on the SPT-3G website pole.uchicago.edu
@NSF @doescience #Antarctica

South Pole Telescope

youtube.com

1 3 10