Astronomers Usually Cannot Tell The Age Of An Individual Star. There Are Certain Stars That We Know Are
Astronomers usually cannot tell the age of an individual star. There are certain stars that we know are very young, and others that are very old, but for most stars we cannot tell. When we have a large group of stars, however, we can tell its age. This is possible because all of the stars in a cluster are presumed to have begun their life at approximately the same time. After a relatively brief time (in 'star time,' that is--we are talking thousands to millions of years here) stars reach the adult phase of their life, which we call the main sequence phase. The length of time a star spends in the main sequence phase depends on its mass. "Constructing a plot, called the HR diagram, of the stars in the cluster, scientists can determine the mass of the stars that are just ending this phase and moving on to the next phase of their life, the red giant phase. Computer models allow us to predict how old a star of that mass must be to be at that juncture of its life, and hence to estimate the age of the cluster. Recently, this procedure has come under close scrutiny because that age it gives for the oldest star clusters in our Milky Way seems to be older than the age of the universe derived from the most recent Hubble Space Telescope data." Asked me this 🔱. @nevi2349 (at SPACE.) https://www.instagram.com/p/CEbzbW9jabB/?igshid=ntt5zye5pk7
More Posts from Amanktyr and Others
Seven Milky Way worlds could harbour life, say astronomers (after just a year of hunting) Written by Damien Gayle The Habitable Exoplanets Catalog (HEC) celebrated its first anniversary with the announcement that it had exceeded expectations in its search for possible new Earths. https://www.instagram.com/p/CDEGyDtHHFZ/?igshid=a6zdhu14qb3y
NASA now is targeting Oct. 31, 2021, for the launch of the agency’s James Webb Space Telescope from French Guiana, due to impacts from the ongoing coronavirus (COVID-19) pandemic, as well as technical challenges. This decision is based on a recently completed schedule risk assessment of the remaining integration and test activities prior to launch. Previously, Webb was targeted to launch in March 2021. https://www.instagram.com/p/CC3Oa6FnTeQ/?igshid=17ss7ti1cfo15
Falling Into Jupiter
Twenty-five years ago, an object roughly the size of an oven made space history when it plunged into the clouds of Jupiter, the largest planet in our solar system. On Dec. 7, 1995, the 750-pound Galileo probe became the first probe to enter the gas giant. Traveling at a blistering speed of 106,000 miles per hour, the probe’s protective heat shield experienced temperatures as hot as the Sun’s surface generated by friction during entry. As the probe parachuted through Jupiter’s dense atmosphere, its science instruments made measurements of the planet’s chemical and physical makeup. The probe collected data for nearly an hour before its signal was lost. Its data was transmitted to Earth via the Galileo spacecraft, an orbiter that carried the probe to Jupiter and stayed within contact during the encounter. Learn more about the mission.
The Galileo probe was launched to space aboard space shuttle Atlantis in 1989
The probe consisted of a descent module and a protective deceleration module
The probe traveled to Jupiter attached to the Galileo spacecraft
The probe was released from the spacecraft in July 1995
The probe entered Jupiter’s atmosphere five months later on Dec. 7, 1995
Parachutes were deployed to slow the probe’s descent
The probe collected science data for 58 minutes as it fell into the planet’s atmosphere
The Galileo probe was managed by NASA’s Ames Research Center in California’s Silicon Valley.
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Mars Perseverance rover 'go for launch,' says NASA The mission is timed for a launch opportunity in July 2020 when Earth and Mars are in good positions relative to each other for landing on Mars. That is, it takes less power to travel to Mars at this time, compared to other times when Earth and Mars are in different positions in their orbits. . . . https://mars.nasa.gov › participate Web results Send Your Name to Mars: Mars 2020 Perseverance . (at NASA) https://www.instagram.com/p/CDKq0aintF0/?igshid=15331enuxi726
❣️❣️We are proud of you ..🙏🙏 This is Sanjana Srinivasan and Esah Prasad, who created this model of #NASAWebb for their 10th grade science project at SSRVM School in Bangalore, India! . Create ; @nasawebb 💙Join our Space family💙 🔔And turn on post notification.🔔 - Kindly follow @_space___lover_ for more interesting posts in future. • Double TAP ❤️ for more.... Follow @_space___lover_ to Learn New Amazing Stuff Everyday - - Do you agree with this post? 💯 ❗️Follow us for more Space Science Facts❗️ @_space___lover_ @_space___lover_ @_space___lover_ @_space___lover_ @_space___lover_ Double tap ❤️ Share More👇 Follow us for more 🌍 -tag:-) #nasa #galaxies #spacetravel #universes #earthplanet #nasabeyond #spacescience #futures #alieninvasion #elonmusk #timetraveler #nasawebb #timetravelers #dangeroustour #mars #spacelover #plutoretrograde #tomcruire #physicsisfun #theoreticalphysics (at India) https://www.instagram.com/p/CDctimVni8D/?igshid=z2297o0ekx84
💙Join our Space family💙 🔔And turn on post notification.🔔 - Kindly follow @_space___lover_ for more interesting posts in future. • Double TAP ❤️ for more.... Follow @_space___lover_ to Learn New Amazing Stuff Everyday - - Do you agree with this post? 💯 ❗️Follow us for more Space Science Facts❗️ @_space___lover_ @_space___lover_ @_space___lover_ @_space___lover_ @_space___lover_ Double tap ❤️ Share More👇 Follow us for more 🌍 -tag:-) #nasa #galaxies #spacetravel #universes #earthplanet #nasabeyond #spacescience #futures #alieninvasion #elonmusk #timetraveler #scifiart #kepler #kepler186f #dangeroustour #mars #spacelover #plutoretrograde #tomcruire #physicsisfun #theoreticalphysics (at Iss - International Space Station - Nasa) https://www.instagram.com/p/CFeZeoQDoDl/?igshid=ulumxyhd8xtr
⬇️ Comment down your thoughts ⬇️ 💙Join our Space family💙 🔔And turn on post notification.🔔 - Kindly follow @_space___lover_ for more interesting posts in future. • Double TAP ❤️ for more.... Follow @_space___lover_ to Learn New Amazing Stuff Everyday - - Do you agree with this post? 💯 ❗️Follow us for more Space Science Facts❗️ @_space___lover_ @_space___lover_ @_space___lover_ @_space___lover_ @_space___lover_ Double tap ❤️ Share More👇 Follow us for more 🌍 -tag:-) #nasa #galaxies #spacetravel #universes #earthplanet #nasabeyond #spacescience #futures #alieninvasion #elonmusk #timetraveler #scifiart #marsmission2020 #dangeroustour #mars #spacelover #plutoretrograde #tomcruire #physicsisfun #theoreticalphysics https://www.instagram.com/p/CD_RodgjSVU/?igshid=umdrxstc8qml
🚀 🅶🆁🅴🅴🆃 🅰🅻🅻 🆂🅿🅰🅲🅴 🅻🅾🆅🅴🆁🆂.🛸 💝 𝗜 𝗹𝗼𝘃𝗲 𝗮𝘀𝘁𝗿𝗼𝗻𝗼𝗺𝘆 .🥰 🌍𝙀𝙖𝙧𝙩𝙝 𝙞𝙨 𝙣𝙤𝙩 𝙢𝙮 𝙝𝙤𝙢𝙚. 🌎 🆕 𝐍𝐞𝐰 𝐩𝐨𝐬𝐭 𝐞𝐯𝐞𝐫𝐲 𝐝𝐚𝐲🔄
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