Size of a Neutron Star
One of the wonders of the cosmos is the neutron star, a star in which the atoms have collapsed. In a single cubic centimeter of neutron star material – a chunk little more than the size of a sugar cube – there are are around 100 million tons of matter. An entire neutron star occupies a sphere that is roughly the size across the island of Manhattan (about 14 miles).
Formation of a Neutron Star
A neutron star is the collapsed core of a giant star. Neutron stars are the smallest and densest stars, not counting black holes, quark stars and strange stars.
Neutron stars result from the supernova explosion of a massive star, combined with gravitational collapse, that compresses the core past white dwarf star density to that of atomic nuclei. Once formed, they no longer actively generate heat, and cool over time.
There are thought to be around 100 million neutron stars in the Milky Way, a figure obtained by estimating the number of stars that have undergone supernova explosions.
The Universe Inside You: The Extreme Science of the Human Body
Background on Brian Clegg
What is Mindfulness?
Mindfulness is paying attention to the present moment deliberately and non-judgmentally.
What is Meditation?
Meditation is the practice of mindfulness in relation to a specific object over a sustained period of time.
When we meditate, we choose an object of meditation and try to stick to it. The object could be physical, such as a candle or statue, or commonly it’s a specific aspect of breathing. Or, the object could be a particular visualization, mantra, or even mind itself.
How Do Mindfulness & Meditation Relate?
The regular practice of meditation supports our development of mindfulness. Improved concentration is one significant way meditation enhances our practice of mindfulness.
When we train ourselves to pay attention to just one thing during meditation, we’re developing a highly transferable skill. We’re also getting better at paying attention to the person sitting across the table from us, eating a meal more mindfully, or enjoying the sun on our backs as we walk across the park on a warm summer’s day.
Messages from God
The importance of the written word can be seen in the number of religions that have sacred texts, and in how often it is claimed a god wrote those texts.
Examples of Ancient Writings
- The Egyptians believed that the ibis-headed Thoth, the scribe of the gods, gave humanity the gift of writing.
- The Assyrians believed it was the god Nabu who gave them the gift of writing.
- The Maya believed that Itzamna, the son of the creator, invented writing and books.
Sacred texts were distributed on a variety of writing materials prior to the invention of paper – and some, such as the Jewish Torah, are still preserved handwritten on animal skin.
Paper: Paging Through History
Where We Are
Our true home is in the here and now. It isn’t limited by time, space, nationality, or race. Our true home isn’t an abstract idea – it’s something we can touch and live in every moment.
The Present Moment
With mindfulness and concentration we can find our true home in the full relaxation of our mind and body in the present moment.
Your True Home: Everyday Wisdom
Thich Nhat Hanh
I tell you one thing –
If you want peace of mind,
Do not find fault with others.
Rather learn to see your own faults.
Learn to make the whole world your own.
Timeless Wisdom: Passages for Meditation from the World’s Saints and Sages