{"id":359,"date":"2025-09-12T01:32:24","date_gmt":"2025-09-12T01:32:24","guid":{"rendered":"https:\/\/wordpress.sciencepicker.com\/?p=359"},"modified":"2025-09-12T01:32:24","modified_gmt":"2025-09-12T01:32:24","slug":"where-does-space-begin","status":"publish","type":"post","link":"https:\/\/www.science-pickers.com\/where-does-space-begin\/","title":{"rendered":"Where does space begin?"},"content":{"rendered":"\n

Space launches are fascinating to witness and even think about.\nA rocket leaps off the pad to space, sounding its way up and generating a shock\nwave of sound that clatters your bones if you’re within a few miles. Within a\nfew minutes, it enters the space, available to deliver payloads. <\/strong><\/p>\n\n\n\n

But when does a spacecraft actually enters the space? It’s a valid question that doesn’t have a positive answer. There is no definite point that describes where space starts. There isn’t a line in the atmosphere with a symbol that says, “Space starts here!”<\/strong><\/p>\n\n\n\n

The boundary between earth and space<\/h2>\n\n\n\n

The boundary between space<\/strong> and “not<\/strong> space<\/strong>” is actually defined by our atmosphere. Below\nhere on the surface of the planet, it supports life. Growing up through the\natmosphere, the air constantly gets more fragile. There is evidence of the\nfumes we breathe more than a hundred miles above our planet, but ultimately,\nthey thin out so much that it’s no different from the near-vacuum of space<\/strong>.\nSome satellites have measured thin bits of Earth’s<\/strong> atmosphere out to\nmore than 800 kilometers away. All satellites orbit well above our atmosphere\nand are formally considered in space<\/strong>. There is no clear-cut line, so\nscientists had to come up with an authentic “border” among atmosphere\nand space<\/strong>.<\/p>\n\n\n\n

Today, the generally agreed-upon explanation of where space<\/strong>\nbegins<\/strong> is around 100 kilometers (62 miles). It’s also called the von\nK\u00e1rm\u00e1n<\/strong> line. Anyone who crosses above 80 km (50 miles) in altitude is\nusually acknowledged a spaceman<\/strong>, according to NASA.<\/p>\n\n\n\n

Exploring atmospheric layers<\/strong><\/h2>\n\n\n\n

To understand why that’s challenging to determine where<\/strong> space<\/strong> begins<\/strong>, take a look at how our atmosphere works. Believe of it as a layer cake composed of gases. It’s thicker near the surface of our planet and weaker at the top. We live and work at the lowest level, and most individuals live in the lower mile or so of the atmosphere. It’s only when we move by air or climb high mountains that we get into areas where the air is considerably thin. The highest mountains rise up to between 4,200 and 9,144 meters (14,000 to nearly 30,000 feet). <\/p>\n\n\n\n

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Source: Shutterstock.com\/acharyahargreaves<\/figcaption><\/figure>\n\n\n\n

Types of space<\/strong><\/h2>\n\n\n\n

Astrophotography\u2019s and planetary experts often distribute the near-Earthspace<\/strong> environment into several regions. There is geospacer<\/strong>, which is the area of space<\/strong> nearest to the Earth<\/strong> but primarily outside the dividing line. Then, there’s cislunar space<\/strong>, which is the section that extends out ahead the Moon<\/strong> and includes both Earth<\/strong> and the Moon<\/strong>. Behind that is interplanetary space<\/strong>, which continues around the Sun and planets, out to the boundaries of the Oort Cloud. The following area is interstellar space<\/strong> which embraces the space<\/strong> between the stars. Ahead is galactic space<\/strong> and intergalactic space<\/strong>, which concentrates on the spaces<\/strong> within the galaxy and between galaxies, individually. In most circumstances, the area between stars and the enormous regions between galaxies is not really abandoned. Those regions normally contain gas molecules and dust and efficiently make up a vacuum. <\/p>\n\n\n\n

Legal space<\/strong><\/h2>\n\n\n\n

For\nideas of law and record-keeping, most authorities study space<\/strong> to start\nat an altitude of 100 km (62 miles), the Von K\u00e1rm\u00e1n<\/strong> line. It’s described\nafter Theodore Von K\u00e1rm\u00e1n<\/strong>, an engineer and physicist who struggled\nmassively in aeronautics and astronautics. He was the person to discover that\nthe atmosphere at this level is extremely thin to support aeronautical flight. <\/p>\n\n\n\n

Politics and the Definition of Outer Space<\/strong>\n\nThe concept of outer space<\/strong> is fundamental to several agreements\nthat govern the friendly uses of space<\/strong> and the bodies in it. For\nexample, the Outer Space<\/strong> Treaty (signed by 104 nations and first passed\nby the United Nations in 1967, holds countries from demanding sovereign\nterritory in outer space<\/strong>. What that implies is that no country can stake\na claim in space<\/strong> and keep others out of it.\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"

Space launches are fascinating to witness and even think about. A rocket leaps off the pad to space, sounding its way up and generating a shock wave of sound that clatters your bones if you’re within a few miles. Within a few minutes, it enters the space, available to deliver payloads. But when does a […]<\/p>\n","protected":false},"author":62,"featured_media":689,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":[],"jnews_primary_category":[],"footnotes":""},"categories":[11],"tags":[],"class_list":["post-359","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-space-and-astronomy"],"_links":{"self":[{"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/posts\/359","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/users\/62"}],"replies":[{"embeddable":true,"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/comments?post=359"}],"version-history":[{"count":2,"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/posts\/359\/revisions"}],"predecessor-version":[{"id":690,"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/posts\/359\/revisions\/690"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/media\/689"}],"wp:attachment":[{"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/media?parent=359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/categories?post=359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.science-pickers.com\/wp-json\/wp\/v2\/tags?post=359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}