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University of Graz News Sternstunden

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Thursday, 07 January 2021

Sternstunden

Astrophysiker Arnold Hanslmeier erklärt astronomische Ereignisse im neuen Jahr. Foto: Uni Graz/Schweiger

Astrophysiker Arnold Hanslmeier erklärt astronomische Ereignisse im neuen Jahr. Foto: Uni Graz/Schweiger

Astrophysiker Arnold Hanslmeier verrät, was sich 2021 astronomisch tut

Viele versuchen auf unterschiedlichen Wegen zu erfahren, was die Sterne im Jahr 2021 so bringen. Einer weiß es genau – aus wissenschaftlicher Sichtweise: Arnold Hanslmeier, Astrophysiker am Institut für Physik der Universität Graz, verrät, welche astronomischen Ereignisse in der nahen Zukunft bevorstehen.

Von den Planeten sieht man Venus im Januar noch tief am Osthorizont in der Morgendämmerung als Morgenstern,  ab Juni taucht sie dann in der Abenddämmerung im Westen auf als Abendstern. Allerdings steht der hellste Planet recht nahe dem Horizont. Gegen Ende Dezember sieht man den Planeten das letzte Mal am Abendhimmel. Im Teleskop erkennt man dann eine Venussichel.
 
Merkur kann ab Mitte Januar etwa zwei Wochen lang am Abendhimmel gefunden werden, eine weitere Abendsichtbarkeit ist Mitte Juni gegeben. Allerdings kann der Planet nur in der fortschreitenden Dämmerung gesehen werden.

Mars ist bis Anfang Mai am Abendhimmel zu sehen, er wandert durch das Sternbild Stier zu den Zwillingen.

Die beiden Riesenplaneten Jupiter und Saturn können gegen Ende März am Morgenhimmel gefunden werden. Jupiter ist am 20. August in Opposition, steht also dann der Erde am nächsten und kann die ganze Nacht hindurch gesehen werden, Saturn erreicht seine Opposition schon am 2. August. Beide Planeten kann man noch bis Jahresende am Abendhimmel finden, wobei sie zusammen mit Venus am Himmel gegen Jahresende eine Kette bilden.
 
Des Weiteren gibt es am 10. Juni eine ringförmige Sonnenfinsternis, die aber nur in Grönland gut zu sehen ist; für Wien wird die Sonne nur zu etwa 4,5 Prozent verfinstert sein, für Graz gerade zu 3,6 Prozent. Die maximale Verfinsterung findet um 12:36 MESZ statt.
Die totale Sonnenfinsternis am 4. Dezember ist bei uns unsichtbar, ebenso wie die totale Mondfinsternis am 26. Mai und die partielle Mondfinsternis am 19. November.

Unsere Sonne zeigt wieder verstärkt Aktivität, steuert also in ihrem elfjährigen Aktivitätszyklus auf ein neues Maximum zu.

created by Andreas Schweiger

Related news

Semester abroad without barriers: University of Graz wins award for promoting inclusion

The University of Graz has been awarded the Internationalization Award for its new inclusion initiative. Students with fewer opportunities now also receive financial support for their semester abroad outside Europe.

Fair distribution: Researchers determine just greenhouse gas budgets for all EU regions

Ten years ago, on 12 December 2015, the Paris Climate Agreement was signed at the UN Climate Conference. In order to limit global warming to well below two degrees, only a certain amount of CO2 may be emitted worldwide. While the focus was originally on national emission targets, more than 200 subnational regions and almost 300 cities have now adopted their own targets. But how many emissions are they fairly entitled to? Researchers at the University of Graz have now developed transparent criteria for fair distribution at the subnational level for the first time and determined corresponding greenhouse gas budgets for all European regions. The paper was published today in the scientific journal Nature Communications.

Chemical Christmas show at the University of Graz: An explosive evening at the Schauspielh

At the beginning of December, the University of Graz transformed the theater into a laboratory: as part of “Chemical Life,” teacher training students staged a chemical Christmas show for Styrian school classes—complete with ethanol rockets, nitrogen snow, and glowing effects. An evening designed to inspire interest in studying chemistry.

Train by train: Koralm railway accelerates exchange between the Universities

Lectures at the University of Klagenfurt in the morning, seminars at the University of Graz in the afternoon: Austria's longest tunnel and a journey time of around 45 minutes make it easy. The Koralm railway increases the speed of networking between the two university locations. The collaboration builds on existing cooperation - for example in the areas of teacher training, Slavic studies and as employers, the universities are well coordinated.

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