Cuir do spòg an-seo airson a dhol air ais dhan duilleag dhachaigh

Dealbhan

Reul-Eòlas

 

Tha ùidh air a bhith agam ann an reul-eòlas bhon uair a bha mi nam leanbhach.  Airson mo naoitheamh co-latha breith, chaidh ar teaghlach gu beachd-ionad nan reul ann an Dùn Èideann.  Chan eil mi airson cus sgriobhaidh mu dheidhinn a’ chuspair seo, ach tha mi’ n dòchas gun còrd na dealbhan ribh.

 

A’ Ghealach

 

‘S e na planaidean a bha a’ chiad rud air an robh ùidh agam a thaobh reul-eòlas.  Tha mi cinnteach gu bheil fios agaibh gu bheil naoi dhiubh anns an t-siostam grèine againn… Mairciuraidh, Bhionas, Talamh, Màirt, Iùpatair, Sathairne, Uranas, Naiptiùn agus Plùto.  Tha ceithir planaidean beaga a lorgamaid nas fhaisge air a’ ghrèin.  Sin a’ chiad ceithir a dh’ainmich mi.  ‘S e ar planaid fhèin, Talamh, an tè as motha a-mach as na ceithir.  ‘S e Mairciuraidh as fhaisge agus as lugha (mur a h-eil sibh a’ cunntadh Plùto).  Tha e iongnantach gu bheil Bhionas nas teotha na Mairciuraidh.  ‘S e an t-àile aig Bhionas as coireach airson sin.

 

MERCURY

Mairciùraidh

 

Seo dealbh de Bionais fodha: Here’s a picture of Venus below:

 

Bhìonas

 

Mar a tha sibh a’ faicinn, tha e mar theine.  Tha diofair mhòr eadar an taobh fuar agus an taobh a dh’ionnsaidh na grèine.  Bidh e 400˚C air a’ ghrunnd.

 

Agus ‘s e seo ar planaid fhèin!

 

An Talamh

 

 

Agus mu dheireadh a-mach as a’ chiad ceithir planaidean, Màirt, ‘s e a’ phlanaid as coltaich ri ar tè fhèin a th’ ann am Màirt.  Tha e ro fhuar ged-tà, agus chan eil ocsaidean gu leòr ann.

 

Màirt

 

Eadar Màirt agus Iupatair, lorgamaid tòrr bheag-phlanaidean (asteroids) ‘s e ‘the asteroid belt’ a’ Bheurla air seo.

 

Beag-Phlanaid

 

‘S e Iupatair a’ phlanaid as fheàrr leam.  ‘S e a’ phlanaid as motha a th’ ann, agus tha e làn rudan inntinneach.  ‘S docha gu bheil sibh uile eòlach air an ainmeil smal dearg.  ‘S docha nach eil fios agaibh gur h-e mòr-ghaoth trì tursan nas motha na an talamh.  ‘S e planaid dèante dìreach le gas, agus fada nas motha na ar talamh.

 

Iùpatair

 

‘S e Sathairne a’ phlanaid as motha as dèidh Iupatair.  Tha e ainmeil airson nam fàinne.  Chan eil mi cho cinnteach fhèin carson a tha fàinneachan mun chuairt Shathairne.  Tha fios agam gu bheil fàinneachan mun chuairt na ceithir planaidean as motha, Iupatair, Sathairne, Uranus agus Naiptiùn.

 

Sathairne

 

‘S e Uranus agus Naiptiùn an ath dhà phlanaid:

  

 

 

 

Uranus (os chionn) agus Neaptiùn (fodha)

 

Agus mu dheireadh, saoghal dorch, planaid neònach agus iomallach, faisg air sia mìle millean ciolometeran bhon ghrèin, ‘s e Plùto:

 

Plùto

 

Tha e a’ cosg ochd mionaid airson solas a bhith gar ruigsinn bhon ghrèin, agus tha sin còrr is 149 millean kilometre air falbh bhuainn!  Ann am facal tha sin a’ ciallachadh gu bheil solas a’ siubhal aig astar 200,000,000 mìle gach diog!  Naoi turas mun chuairt na talmhainn ann an dìreach aon diog!  Tha an rionnag as fhaisg oirnn (às dèidh na grèine) 4.3 ly (light-year) air falbh.  ‘S e Proxima Centauri an t-ainm a th’ oirre.  Tha sinn air ar lorg air fear de na casan a tha mar cuairteachan (spirals) mun chuairt ar galacsaidh.

 

Chruinneachadh mòr de reultan (Galacsaidh)

 

You can see just how densely compact all the stars are.  There are literally trillions of stars in our galaxy, each one dwarfing our planet.  When you consider that then there are billions of galaxies, we begin to realise how small we are.  The latest thinking is that there is an enormous blackhole at the centre of the galaxy.  Blackholes have almost infinite gravity, which is why light can’t escape.  Sometimes they are incredibly small, only a few miles in diameter, but don’t underestimate them.  They are powerful enough to suck in whole stars.  A blackhole is effectively a star which has first exploded as a supernova, then collapsed into itself under it’s own weight.  They obviously can’t be seen, by definition, light can’t escape and therefore they don’t emit light.  They are detected by their gravity.  Here is a spectacular supernova (exploded star):

 

Mòr-spreadhadh reul/Supernova

 

These events are not very common, but occur all over the galaxy.  Stars emit different colours because they burn at different temperatures.  Red stars tend to be cooler than white ones.  You get stars of all different sizes.  The Sun is a relatively small one.  Most of the matter in the universe is so called ‘dark-matter’, matter that does not emit light.  It is detectable only by it’s presence.  It could be vast quantities of cosmic dust.  The Hubble Space Telescope was a major breakthrough in the astronomy world.  For the first time it allowed us to look far into the depths of the universe.

 

Dealbh gu math farsaing de mhòr-chruinneachaidhean de reultan

A wide picture showing many galaxies

 

 

The above picture is a vast area showing many galaxies, each one containing billions of stars, each star dwarfing the Earth.  It is a series of pictures taken by the telescope. 

 

Galaxies cluster together.  This is because of gravity.  All things (matter) with mass have a gravitational pull.  We can see this by the pull between the Earth and Moon.  It is the gravitational pull of the Moon, which causes waves in our planet’s oceans. 

 

In my opinion the universe is expanding at an ever-increasing rate, caused by the lessening effect of gravity, as the galaxies grow further away from each other.  As the gravitational pull lessens, there is less to hold them back, and therefore move away at a quicker pace, the more they do this, the lesser the effect of gravity, and the further apart they spread.  My thought about the fate of the universe is that it will continue to do this for eternity, eventually becoming a very dark place.  There are others who believe that the universe is expanding at a constant rate, others who believe that it is expanding at an ever decreasing rate and even some who think that it will eventually start to reverse, and implode on itself.