Estonia in the context of "Sand"

The East European Plain (also called the Russian Plain, or historically the Sarmatic Plain) is a vast interior plain extending east of the North European Plain, and comprising several plateaus stretching roughly from 25 degrees longitude eastward. It includes Volhynian-Podolian Upland on its westernmost fringe, the Central Russian Upland, and, on the eastern border, encompasses the Volga Upland. The plain includes also a series of major river basins such as the Dnieper Lowland, the Oka–Don Lowland, and the Volga Basin. At the southeastern point of the East European Plain are the Caucasus and Crimean mountain ranges. Together with the North European Plain (covering much of Belgium, the Netherlands, Denmark, Germany and Poland), and covering the Baltic states (Estonia, Latvia and Lithuania), European Russia, Belarus, Ukraine, Moldova, southeastern Romania, and, at its southernmost point, the Danubian Plain in Northern Bulgaria (including Ludogorie and Southern Dobruja), it constitutes the majority of the Great European Plain (European Plain), the greatest mountain-free part of the European landscape. The plain spans approximately 4,000,000 km (2,000,000 sq mi) and averages about 170 m (560 ft) in elevation. The highest point of the plain (480 metres (1,574.8 ft)) is in the Bugulma-Belebey Upland, in the Eastern part of the plain, in the elevated area by the Ural Mountains (priyralie).

Observational astronomy is a division of astronomy that is concerned with recording data about the observable universe, in contrast with theoretical astronomy, which is mainly concerned with calculating the measurable implications of physical models. It is the practice and study of observing celestial objects with the use of telescopes and other astronomical instruments.

As a science, the study of astronomy is somewhat hindered in that direct experiments with the properties of the distant universe are not possible. However, this is partly compensated by the fact that astronomers have a vast number of visible examples of stellar phenomena that can be examined. This allows for observational data to be plotted on graphs, and general trends recorded. Nearby examples of specific phenomena, such as variable stars, can then be used to infer the behavior of more distant representatives. Those distant yardsticks can then be employed to measure other phenomena in that neighborhood, including the distance to a galaxy.

Estonia, historically a Lutheran Christian nation, is today one of the least religious countries in the world in terms of declared attitudes, with only 14 percent of the population declaring religion to be an important part of their daily life.

The Molotov–Ribbentrop Pact, officially the Treaty of Non-Aggression between Germany and the Union of Soviet Socialist Republics, and also known as the Hitler–Stalin Pact, the Berlin–Moscow Pact and the Nazi–Soviet Pact, was a non-aggression pact between Nazi Germany and the Soviet Union, with a secret protocol establishing Soviet and German spheres of influence across Eastern Europe. The pact was signed in Moscow on 24 August 1939 (backdated 23 August 1939) by Soviet Foreign Minister Vyacheslav Molotov and German Foreign Minister Joachim von Ribbentrop.

Tripartite discussions between the Soviet Union, the United Kingdom and France had broken down after the Soviet Union was excluded from the Munich Agreement in September 1938. Joseph Stalin, the General Secretary of the Communist Party of the Soviet Union, had indicated that the USSR was willing to support Czechoslovakia militarily if France did so as well. Subsequently, rapprochement between Soviet Union and Nazi Germany began in early 1939. Later that year the Soviet-German pact was agreed, committing both sides to neither aid nor ally itself with an enemy of the other for the following 10 years. Under the Secret Additional Protocol of 23 August 1939, Germany and the Soviet Union agreed to partition Poland; Latvia, Estonia, Finland and Bessarabia were allotted to the Soviet sphere, while Lithuania – apart from the Vilnius region, whose "interests" were recognized – lay in the German sphere (Lithuania – including the Vilnius region, but excluding a strip of land – was only transferred to the Soviet sphere by the 28 September 1939 Boundary and Friendship Treaty). In the west, rumored existence of the Secret Protocol was proven only when it was made public during the Nuremberg trials.

The Baltic states—Estonia, Latvia and Lithuania—were occupied and annexed by the Soviet Union in 1940 and remained under its control until its dissolution in 1991. For a period of several years during World War II, Nazi Germany occupied the Baltic states after it invaded the Soviet Union in 1941.

The initial Soviet invasion and occupation of the Baltic states began in June 1940 under the Molotov–Ribbentrop Pact, made between the Soviet Union and Nazi Germany in August 1939, before the outbreak of World War II. The three independent Baltic countries were annexed as constituent Republics of the Soviet Union in August 1940. Most Western countries did not recognise this annexation, and considered it illegal. In July 1941, the occupation of the Baltic states by Nazi Germany took place, just weeks after its invasion of the Soviet Union. The Third Reich incorporated them into its Reichskommissariat Ostland. In 1944, the Soviet Union recaptured most of the Baltic states as a result of the Red Army's Baltic Offensive, trapping the remaining German forces in the Courland Pocket until their formal surrender in May 1945.

Finland, officially the Republic of Finland, is a Nordic country in Northern Europe. It borders Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland to the south, opposite Estonia. Finland has a population of 5.6 million, the majority being ethnic Finns. Its capital and largest city is Helsinki. The official languages are Finnish and Swedish, the mother tongues of 84.1 percent and 5.1 percent of the population, respectively. Finland's climate varies from humid continental in the south to boreal in the north. Its land is predominantly covered by boreal forest, with over 180,000 recorded lakes.

Finland was first settled around 9000 BC after the last Ice Age. During the Stone Age, various cultures emerged, distinguished by different styles of ceramics. The Bronze Age and Iron Ages were marked by contacts with other cultures in Fennoscandia and the Baltic region. From the late 13th century, Finland became part of Sweden following the Northern Crusades. In 1809, as a result of the Finnish War, Finland was captured from Sweden and became an autonomous grand duchy within the Russian Empire. During this period, Finnish art flourished and an independence movement gradually developed.

The Baltic states or the Baltic countries is a geopolitical term encompassing Estonia, Latvia, and Lithuania. All three countries are members of NATO, the European Union, the Eurozone, and the OECD. The three sovereign states on the eastern coast of the Baltic Sea are sometimes referred to as the "Baltic nations", less often and in historical circumstances also as the "Baltic republics", the "Baltic lands", or simply the Baltics.

All three Baltic countries are classified as high-income economies by the World Bank and maintain a very high Human Development Index. The three governments engage in intergovernmental and parliamentary cooperation. There is also frequent cooperation in foreign and security policy, defence, energy, and transportation.

The post-Soviet states, also referred to as the former Soviet Union or the former Soviet republics, are the independent sovereign states that emerged/re-emerged from the dissolution of the Soviet Union in 1991. Prior to their independence, they existed as Union Republics, which were the top-level constituents of the Soviet Union. There are 15 post-Soviet states in total: Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan. Each of these countries succeeded their respective Union Republics: the Armenian SSR, the Azerbaijan SSR, the Byelorussian SSR, the Estonian SSR, the Georgian SSR, the Kazakh SSR, the Kirghiz SSR, the Latvian SSR, the Lithuanian SSR, the Moldavian SSR, the Russian SFSR, the Tajik SSR, the Turkmen SSR, the Ukrainian SSR, and the Uzbek SSR. In Russia, the term "near abroad" (Russian: ближнее зарубежье, romanized: bližneye zarubežye) is sometimes used to refer to the post-Soviet states other than Russia.

Following the transition period and cessation of the existence of the Soviet Union, post-Soviet states and the international community de facto and de jure recognized Russia as the only continuator state to the Soviet Union as a whole, rather than to just the Russian SFSR including UN and UNSC membership (see agreements in Succession, continuity and legacy of the Soviet Union). The other post-Soviet states were recognized as successors only to their corresponding Union Republics and to international treaties concluded by the Soviet Union. All 12 post-Soviet states are successors of the Soviet Union, but not continuators.

Latvia, officially the Republic of Latvia, is a country in the Baltic region of northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to the southeast and shares a maritime border with Sweden to the west. Latvia covers an area of 64,589 km (24,938 sq mi), with a population of 1.8 million. The country has a temperate seasonal climate. Its capital and largest city is Riga. Latvians, who are the titular nation and comprise 65.5% of the country's population, belong to the ethnolinguistic group of the Balts and speak Latvian. Russians are the most prominent minority in the country, at almost a quarter of the population; 37.7% of the population speak Russian as their native tongue.

After centuries of Teutonic, Swedish, Polish-Lithuanian, and Russian rule, the independent Republic of Latvia was established on 18 November 1918 after breaking away from the Russian Empire in the aftermath of World War I. The country became increasingly autocratic after the coup in 1934 established the dictatorship of Kārlis Ulmanis. Latvia's de facto independence was interrupted at the outset of World War II, beginning with forcible incorporation into the Soviet Union, followed by the invasion and occupation by Nazi Germany in 1941 and the re-occupation by the Soviets in 1944, which formed the Latvian SSR for the next 45 years. As a result of extensive immigration during the Soviet occupation, ethnic Russians became the most prominent minority in the country. The peaceful Singing Revolution started in 1987 among the Baltic Soviet republics and ended with the restoration of both de facto and official independence on 21 August 1991. Latvia has since been a democratic unitary parliamentary republic.

Pskov (Russian: Псков, IPA: [psˈkof] ; see also names in other languages) is a city in northwestern Russia and the administrative center of Pskov Oblast, located about 20 kilometers (12 mi) east of the Estonian border, on the Velikaya River. Population: 193,082 (2021 census); 203,279 (2010 census); 202,780 (2002 census); 203,789 (1989 Soviet census).

Pskov is one of the oldest cities in Russia. During the Middle Ages, it served as the capital of the Pskov Republic and was a trading post of the Hanseatic League before it was incorporated into the Grand Duchy of Moscow and became an important border fortress in the Tsardom of Russia.

The Baltic Way (Lithuanian: Baltijos kelias; Latvian: Baltijas ceļš; Estonian: Balti kett) or Baltic Chain (also "Chain of Freedom") was a peaceful political demonstration that occurred on 23 August 1989. Approximately two million people joined their hands to form a human chain spanning 675 kilometres (419 mi) across the three Baltic states of Estonia, Latvia, and Lithuania, with a combined population of around eight million citizens, who had been subjected to the Soviet Union's occupation and communist repression for more than 45 years, precisely speaking, between the Soviet Union's re-occupation of the Baltic states in 1944 (which took place alongside Soviet Union's Red Army's counteroffensive towards the west during the final years of World War II) and the Singing Revolution (a series of Baltic independence movements between 1987 and 1991), which culminated in Estonia, Latvia, and Lithuania's independence, that was achieved just before the dissolution of the Soviet Union in 1991. The central government in Moscow considered the three Baltic countries constituent republics of the Soviet Union.

The demonstration originated from "Black Ribbon Day" protests held in Western cities in the 1980s. It marked the 50th anniversary of the Molotov–Ribbentrop Pact, in which Poland, Finland, Estonia, Latvia, Lithuania, and Romania were (as "spheres of influence") divided between the Soviet Union and Nazi Germany. The Soviet-Nazi pact led to the outbreak of World War II in September 1939 and the Soviet invasion and occupation of the Baltic countries in June 1940.

The economy of Europe comprises about 748 million people in 50 countries. Throughout this article "Europe" and derivatives of the word are taken to include selected states whose territory is only partly in Europe, such as Turkey, Azerbaijan and Georgia, and states that are geographically in Asia, bordering Europe and culturally adherent to the continent, such as Armenia and Cyprus.

There are differences in wealth across Europe which can be seen roughly along the former Cold War divide, with some countries breaching the divide (Greece, Portugal, Slovenia, the Czech Republic, Lithuania, Latvia and Estonia). Whilst most European states have a GDP per capita higher than the world's average and are very highly developed, some European economies, despite their position over the world's average in the Human Development Index, are relatively poor. Europe has total banking assets of more than $50 trillion; the United Kingdom accounts for 25% ($12 trillion) of Europe’s total banking assets followed by France with 20% ($10 trillion) and Germany with 15% ($7 trillion). Europe Global assets under management is more than $20 trillion, with the United Kingdom accounting for more than 40% ($8 trillion) of Europe’s total AUM followed by France with 20% ($4 trillion) and Germany with 12% ($2 trillion). London and Paris are by far the economically strongest cities in Europe, each with a GDP exceeding $1 trillion. London and Paris are major economic hubs in Europe, with the London Stock Exchange and Euronext Paris, the two largest stock exchanges in Europe by market cap.

The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North and Central European Plain regions. It is the world's largest brackish water basin.

The sea stretches from 53°N to 66°N latitude and from 10°E to 30°E longitude. It is a shelf sea and marginal sea of the Atlantic with limited water exchange between the two, making it an inland sea. The Baltic Sea drains through the Danish straits into the Kattegat by way of the Øresund, Great Belt and Little Belt. It includes the Gulf of Bothnia (divided into the Bothnian Bay and the Bothnian Sea), the Gulf of Finland, the Gulf of Riga and the Bay of Gdańsk.

The demographics of Estonia in the 21st century result from historical trends over more than a thousand years, as with most European countries, but have been disproportionately influenced by events in the second half of the 20th century. The Soviet occupation (1944–1991), extensive immigration from Russia and other parts of the former USSR, and the eventual restoration of independence of Estonia, have all had a major effect on Estonia's current ethnic makeup. The influx was largely due to the country's troubled demographics and continued need for labour. After its independence, Estonia continued to bring in the needed labour power from the same countries as it did during the Soviet times.

The languages spoken in Estonia largely reflect the composition of the indigenous and immigrant ethnic groups residing in Estonia, and thus have changed with historical trends affecting the ethnic makeup of the country. Similarly to other northern European peoples, religion plays a rather small part in the lives of most Estonians.

Observation in the natural sciences refers to the active acquisition of information from a primary source. It involves the act of noticing or perceiving phenomena and gathering data based on direct engagement with the subject of study.

In living organisms, observation typically occurs through the senses. In science, it often extends beyond unaided perception, involving the use of scientific instruments to detect, measure, and record data. This enables the observation of phenomena not accessible to human senses alone.

The Bürgerliches Gesetzbuch (German: [ˈbʏʁɡɐlɪçəs ɡəˈzɛtsbuːx] , lit. 'Civil Law Book'), abbreviated BGB, is the civil code of Germany, codifying most generally-applicably private law. In development since 1881, it became effective on 1 January 1900, and was considered a massive and groundbreaking project.

The BGB served as a template in several other civil law jurisdictions, including Japan, Korea, the Republic of China (Taiwan), Thailand, Brazil, Greece, Estonia, Latvia, and Ukraine. It also had a major influence on the 1907 Swiss Civil Code, the 1942 Italian Civil Code, the 1966 Portuguese Civil Code, and the 1992 reformed Dutch Civil Code.