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#environment #nature #lockdown2020 #sustainability #climatechange #ecofriendly #savetheplanet #zerowaste #sustainable #gogreen #earth #green #recycle #eco #plasticfree #globalwarming #pollution #reuse #climate #sustainableliving #environmentallyfriendly #art #love #photography #water #conservation #naturephotography #vegan #recycling #plastic https://www.instagram.com/p/CBSQHzujftm/?igshid=1alb7fzx0wz12

Penumbral Lunar Eclipse, 5-6th June 2020 . . . . . . #lunar #lunarbeauty #lunar2020 #lunareclipse2020 #eclipse https://www.instagram.com/p/CBBqfocDYR-/?igshid=1ru379a68xmic

Today in film industry another unfortunate demise! The Most Romantic, Versatile, Legendary actor Rishi Kapoor Sir, it sad that he is no more. He surely had an iconic one of my favourite. I enjoyed his many films, sang your romantic songs sir and immersed myself in many of your songs because there was a different kind of addiction in your songs, I really enjoyed your songs. The very popular, savoury, a very happy kind of person who used to awaken the hearts of love in the hearts of people with his romantic films, the craze of his films kept the hearts of the people. Our heartfelt condolence goes out to his family, friends and fans. Rishi Ji is considered as the Original Prince of Romance.🙏 #rishikapoor #filmisnotdead (at Aligarh) https://www.instagram.com/p/B_msrGsj9TZ/?igshid=7nswnym8h0s6

It’s Mental Health Month, Tumblr!

Your mental health is important. Because of the coronavirus, people all around the world are experiencing high levels of mental and emotional stress. That’s why this year’s Mental Health Month initiative will focus on common aspects of isolation and loneliness: how to protect, maintain, and improve your mental health, how to manage your relationships inside and outside of your household, how to combat boredom, and how to deal with the grief you might be feeling.

All month long our friends at Ditch the Label (@ditchthelabel), a UK anti-bullying non-profit, will post resources to guide you through some of the emotional hardships you may be feeling right now. Here on @postitforward, we’ll be reblogging the best stuff we see from them, the top-notch stuff we see from the rest of the Tumblr community, and posting exclusive original art from some of our very own Tumblr @creatrs. 

Some of you may be concerned with your mental health for the first time in your life. For others, existing mental health issues may be exacerbated by current events—especially for those of you who may be quarantined with people whose values are at odds with your own. We see you, and we want to help.

If you don’t want to see these posts, that’s okay! Taking good care of your mind comes in many forms. We’ll tag all of our posts with “cw mental health month” as well as more specific tags when appropriate so you can use the tag filtering tool to keep them from your dashboard. And, hey, if you’re looking for a totally stress-free zone, go out and check out Cozy (@cozy)—it’s a blog we created to embrace a little escapism. Otherwise, be sure to give Ditch the Label (@ditchthelabel) a follow if you’re interested in the tools and guidance they will be providing starting May 4.

One last thing: If you or someone you know are struggling and don’t know where to turn to, here’s a list of free counseling services located all over the world

Do your best to take care of yourself, Tumblr. <3

International Astronomy Day 2020 is celebrated on May 2. Take some time away from all the current distractions and look up at the amazing stars in the sky. International Astronomy Day is celebrated twice a year one in autumn and another in spring. The world will celebrate the next Astronomy Day on September 26. ---TheWorldNeedsAmazing--- Camera : Nikon Aperture : f/4 ISO. : 1600 . . . . . . . . . . . . #internationalastronomyday #astronomy #scicomm #astronomyphotography #astronomyday #astronomypictureoftheday #yourshotphotographer #stargazing #nightshooters #nightskyphotography #mountainlife #travellerlife #travelling #traveller_stories #travels #travellersdiary #traveller_india #photoeveryday #photoshot #shots #image #click #mountaineering #universe #scicommindia #graphicdesign #travelphotography #nikonphotography #nikon #nikonshot https://www.instagram.com/p/B_r2FS_j8Ad/?igshid=1kogdhu4nars4

It's very useful information about White Dwarfs.

What are white dwarfs?

Some curiosities about white dwarfs, a stellar corpse and the future of the sun.

Where a star ends up at the end of its life depends on the mass it was born with. Stars that have a lot of mass may end their lives as black holes or neutron stars.

A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula.

In 5.4 billion years from now, the Sun will enter what is known as the Red Giant phase of its evolution. This will begin once all hydrogen is exhausted in the core and the inert helium ash that has built up there becomes unstable and collapses under its own weight. This will cause the core to heat up and get denser, causing the Sun to grow in size.

It is calculated that the expanding Sun will grow large enough to encompass the orbit’s of Mercury, Venus, and maybe even Earth.

A typical white dwarf is about as massive as the Sun, yet only slightly bigger than the Earth. This makes white dwarfs one of the densest forms of matter, surpassed only by neutron stars and black holes.

The gravity on the surface of a white dwarf is 350,000 times that of gravity on Earth. 

White dwarfs reach this incredible density because they are so collapsed that their electrons are smashed together, forming what is called “degenerate matter.” This means that a more massive white dwarf has a smaller radius than its less massive counterpart. Burning stars balance the inward push of gravity with the outward push from fusion, but in a white dwarf, electrons must squeeze tightly together to create that outward-pressing force. As such, having shed much of its mass during the red giant phase, no white dwarf can exceed 1.4 times the mass of the sun.

While many white dwarfs fade away into relative obscurity, eventually radiating away all of their energy and becoming a black dwarf, those that have companions may suffer a different fate.

If the white dwarf is part of a binary system, it may be able to pull material from its companion onto its surface. Increasing the mass can have some interesting results.

One possibility is that adding more mass to the white dwarf could cause it to collapse into a much denser neutron star.

A far more explosive result is the Type 1a supernova. As the white dwarf pulls material from a companion star, the temperature increases, eventually triggering a runaway reaction that detonates in a violent supernova that destroys the white dwarf. This process is known as a single-degenerate model of a Type 1a supernova. 

If the companion is another white dwarf instead of an active star, the two stellar corpses merge together to kick off the fireworks. This process is known as a double-degenerate model of a Type 1a supernova.

At other times, the white dwarf may pull just enough material from its companion to briefly ignite in a nova, a far smaller explosion. Because the white dwarf remains intact, it can repeat the process several times when it reaches the critical point, briefly breathing life back into the dying star over and over again. 

Image credit: www.aoi.com.au, NASA, Wikimedia Commons, Fsgregs, quora.com, quora.com, NASA’s Goddard Space Flight Center, S. Wiessinger, ESO, ESO, Chandra X-ray Observatory

Source: NASA, NASA, space.com

2016 a precies moment of time. Remember juncture, these are the days we try to recreate. .. . . . . . . . . . #moment #love #instagood #me #tbt #photooftheday #instamood #tweegram #picoftheday #beautiful #instadaily #summer #follow #igdaily #bestoftheday #followme #follow #followforfollow #followback #followers #follow4follow #followher #follower #followhim #followall #followbackteam #followbackalways #follows https://www.instagram.com/p/CBnGpOUDE2Y/?igshid=107bom4vdyheu

#mountainlife #world #mountaineering #mountains #mountaintop #mountaindewice #mountainstones #mountainscape #traveller_stories #travelphotography #travellerlife #travelblogger #travelholic #traveltheworld https://www.instagram.com/p/CCCOqVfDLH5/?igshid=160uuujbpcwgj

The full moon is behind the silhouette of the tree. . . . . . . . . . . #moonphases #moon #moonlover #moonphoto #moonshot #moonshadow #moon_of_the_day #moonphotography #moontree #quarantinestories #quarantinechallenge #quarantine2020 #lockdown2020 #stayhome #quarantinemood https://www.instagram.com/p/B-yhvkFjmMt/?igshid=r7qsmfrgszd