Thomas R. Greve

Dad, husband, Professor of Astronomy and Co-Director @DAWNCopenhagen, @DTUSpace. Studies faint cosmic smudges for a living. Table tennis aficionado.

[Thomas R. Greve @ThomasRGreve]

A massive thank you to the @usembdenmark for the opportunity to go to Pituffik Space Base in Greenland and tell #dkmedier about the Greenland Telescope and the astronomical research we are pursuing with it. 🇬🇱🇩🇰🇺🇸🇹🇼 #dkforsk @Carlsbergfondet @DAWNCopenhagen @DTUSpace

[French Response @FrenchResponse]

🇪🇺

[Polling USA @USA_Polling]

Support For Taking Greenland By Force:

Oppose: 68%
Support: 8%

YouGov / Jan 12, 2026

[Orla Joelsen @OJoelsen]

Statement from the Premier of Greenland 🇬🇱
January 13, 2026
3:40 pm

First and foremost, I would like to repeat: Greenland is not for sale.

Today, we have discussed our cooperation between Greenland and Denmark. And let me clear that Greenland is part of the Kingdom of Denmark. Greenland is based on the rule of law and democratic values with self-government under the Kingdom of Denmark.

The situation is very very serious and geopolitical interests have put massive pressure on our country and its population.

Greenland is, as a part of the Kingdom of Denmark, a member of NATO. We have great faith in the NATO-alliance. And know that NATO supports us in this situation.

And the support from Europe and Denmark is absolutely crucial in the current situation.

We stand together for the inviolability of territories, for democratic values and for the protection of democracy.

Our goal and wish is to continue a peaceful dialogue based on cooperation with respect for our constitutional position, international law and the right to our country, and our right to self-determination.

But there is one thing everybody must understand.

• Greenland does not want to be owned by the USA.
• Greenland does not want to be governed by the USA.
• Greenland does not want to be part of the USA.

We choose the Greenland, we know today, and which is part of the Kingdom of Denmark.

We face a geopolitical crisis. And if we have to choose between the USA and Denmark here and now, we choose Denmark.

We choose NATO, we choose the Kingdom of Denmark, we choose the EU.
It is not time for internal discussions and division.

It is time to stand together and continue to build upon the community we know and the community we wish for.

Source; Government of Greenland

[Rasmus Jarlov @RasmusJarlov]

It is time to stop terrorising these innocent people. Take a listen and look yourself in the mirror.

[Thomas R. Greve @ThomasRGreve]

@Paurush01 @AandA_journal @aswinpvijayan It was a pleasure having you at @DAWNCopenhagen! And congratulations on your great work!

[ian bremmer @ianbremmer]

danish pm frederiksen on usha vance/mike waltz greenland trip:

“it is clearly not a visit that is about what greenland needs, or what greenland wants…it is unacceptable pressure being placed on greenland and denmark in this situation. and it is pressure that we will resist.”

[Timothy Snyder @TimothyDSnyder]

Something is shifting. They are still breaking things and stealing things. And they will keep trying to break and to steal. But the propaganda magic around the oligarchical coup is fading. Nervous Musk, Trump, Vance have all been outclassed in public arguments these last few days. Government failure, stock market crash, and dictatorial alliances are not popular. People are starting to realize that there is no truth here beyond the desire for personal wealth and power.

[Magnus Heunicke @Heunicke]

Stærkt at se netop de fire her spise sammen i aften i København ♥️💪
🇩🇰🇸🇪🇳🇴🇫🇮

[Thomas R. Greve @ThomasRGreve]

@elonmusk You are a fool.

[Prof Michael E. Mann @MichaelEMann]

On the bright side, we now have an answer to the Fermi Paradox

[Kresten Lindorff-Larsen @LindorffLarsen]

import pandas as np
import numpy as plt
import matplotlib.pyplot as pd

Happy halloween 🎃

[Thomas R. Greve @ThomasRGreve]

Check out this video about the Greenland Telescope, which our friends at @usembdenmark have produced.

[Thomas R. Greve @ThomasRGreve]

Sådan. Lad os etablere et dansk rumkonsortium. @DTUSpace

[Mikkel Haarder @mhaarder]

Har kronik i @weekendavisen: Der er en rivende udvikling i rumteknologi og rumforskning, men vi mangler national samling for at forløse potentialet for forskning og erhvervsliv. Kom nu, Danmark! #dkforsk https://t.co/yJ574fgaAH

[Pablo Pérez González @PGPerezGonzalez]

The outcome of a very nice workshop at @ISSIBern is out. Great time in Bern with great discussions led by @NotaAntonella aimed to show the world what @ESA_Webb @NASAWebb is telling us about how “all this” (aka “galaxies in the Universe”) started.

[Carlsbergfondet @Carlsbergfondet]

✨#MånedensForsker Lars A. Buchhave forsker i exoplaneter og pt i exoplaneters atmosfære, der kan være nøglen til at forstå, om der findes liv i rummet. Hør podcasten 'Er der liv i fjerne galakser?' 👉https://t.co/XbY4XHhdQO
#dkforsk @DTUSpace @DTUtweet

[Ursula von der Leyen @vonderleyen]

With the right investments, Greenland can turn into a clean energy hub.

You can develop strategic industries, like clean hydrogen.

And create new jobs, good jobs, right here in Greenland.

Here, too, Europe wants to be your partner.

[Thomas R. Greve @ThomasRGreve]

For three years and a bit, I have had the great fortune to work with Malte, who obtained his PhD yesterday at DAWN. It has been a wonderful mix of great fun and exciting research, and we will miss him at DAWN.

[DAWN - The Cosmic Dawn Center @DAWNCopenhagen]

Many congratulations to DAWN astronomer Malte Brinch for defending his PhD thesis. Malte has discovered a number of z > 6 proto-cluster candidates in the COSMOS field and using Keck spectroscopically confirmed two massive clusters at z=6.

[Thomas R. Greve @ThomasRGreve]

@BjornLomborg There is no correlation in that Fig. 3. Should have done a simple rank correlation coefficient (e.g., pearson or spearman). An R^2 value of 0.06 suggests the 'fit' is a really poor model (as can be seen by eye). The other two figures (4+5) seem trivial and hardly surprising.

[Thomas R. Greve @ThomasRGreve]

@peterdalsgaard @UFM_MIN @AarhusUni Tillykke!