Śrīmad-Bhāgavatam 5.20.30
తద్ద్వీపమధ్యే మానసోత్తరనామైక ఏవార్వాచీనపరాచీనవర్షయోర్మర్యాదాచలోఽయుతయోజనోచ్ఛ్రాయాయామో యత్ర తు చతసృషు దిక్షు చత్వారి పురాణి లోకపాలానామిన్ద్రాదీనాం యదుపరిష్టాత్సూర్యరథస్య మేరుం పరిభ్రమత: సంవత్సరాత్మకం చక్రం దేవానామహోరాత్రాభ్యాం పరిభ్రమతి ॥ ౩౦ ॥
tad-dvīpa-madhye mānasottara-nāmaika evārvācīna-parācīna-varṣayor maryādācalo ’yuta-yojanocchrāyāyāmo yatra tu catasṛṣu dikṣu catvāri purāṇi loka-pālānām indrādīnāṁ yad-upariṣṭāt sūrya-rathasya meruṁ paribhramataḥ saṁvatsarātmakaṁ cakraṁ devānām aho-rātrābhyāṁ paribhramati.
[tad-dveepa-madhye maanasottara-naamaika evaarvaacheena-paraacheena-varshayor maryaadaachalo ’yuta-yojanochchraayaayaamo yatra tu chatasrishu dikshu chatvaari puraani loka-paalaanaam indraadeenaam yad-uparishtaat soorya-rathasya merum paribhramatah samvatsaraatmakam chakram devaanaam aho-raatraabhyaam paribhramati.]
Word-for-word
tat-dvīpa-madhye
—
within that island
mānasottara
—
Mānasottara
nāma
—
named
ekaḥ
—
one
eva
—
indeed
arvācīna
—
on this side
parācīna
—
and beyond, or outside
varṣayoḥ
—
of tracts of land
maryādā
—
indicating the boundary
acalaḥ
—
a great mountain
ayuta
—
ten thousand
yojana
—
eight miles
ucchrāya-āyāmaḥ
—
whose height and width
yatra
—
where
tu
—
but
catasṛṣu
—
in the four
dikṣu
—
directions
catvāri
—
four
purāṇi
—
cities
loka-pālānām
—
of the directors of planetary systems
indra-ādīnām
—
headed by Indra
yat
—
of which
upariṣṭāt
—
on the top
sūrya-rathasya
—
of the chariot of the sun-god
merum
—
Meru Mountain
paribhramataḥ
—
while circumambulating
saṁvatsara-ātmakam
—
consisting of one saṁvatsara
cakram
—
wheel or orbit
devānām
—
of the demigods
ahaḥ-rātrābhyām
—
by the day and night
paribhramati
—
moves around.
Blended reading (Sanskrit + English inline)
tad-dvīpa-madhye mānasottara-nāmaika evārvācīna-parācīna-varṣayor maryādācalo ’yuta-yojanocchrāyāyāmo yatra tu catasṛṣu dikṣu catvāri purāṇi loka-pālānām indrādīnāṁ yad-upariṣṭāt sūrya-rathasya meruṁ paribhramataḥ saṁvatsarātmakaṁ cakraṁ devānām aho-rātrābhyāṁ paribhramati.
tat-dvīpa-madhye
within that island
mānasottara
Mānasottara
nāma
named
ekaḥ
one
eva
indeed
arvācīna
on this side
parācīna
and beyond, or outside
varṣayoḥ
of tracts of land
maryādā
indicating the boundary
acalaḥ
a great mountain
ayuta
ten thousand
yojana
eight miles
ucchrāya-āyāmaḥ
whose height and width
yatra
where
tu
but
catasṛṣu
in the four
dikṣu
directions
catvāri
four
purāṇi
cities
loka-pālānām
of the directors of planetary systems
indra-ādīnām
headed by Indra
yat
of which
upariṣṭāt
on the top
sūrya-rathasya
of the chariot of the sun-god
merum
Meru Mountain
paribhramataḥ
while circumambulating
saṁvatsara-ātmakam
consisting of one saṁvatsara
cakram
wheel or orbit
devānām
of the demigods
ahaḥ-rātrābhyām
by the day and night
paribhramati
moves around.
In the middle of that island is a great mountain named Mānasottara, which forms the boundary between the inner side and the outer side of the island. Its breadth and height are 10,000 yojanas [80,000 miles]. On that mountain, in the four directions, are the residential quarters of demigods such as Indra. In the chariot of the sun-god, the sun travels on the top of the mountain in an orbit called the Saṁvatsara, encircling Mount Meru. The sun’s path on the northern side is called Uttarāyaṇa, and its path on the southern side is called Dakṣiṇāyana. One side represents a day for the demigods, and the other represents their night.
Purport
The movement of the sun is confirmed in the Brahma-saṁhitā (5.52) : yasyājṣāya bhramati saṁbhṛta-kāla-cakraḥ. The sun orbits around Mount Sumeru, for six months on the northern side and for six months on the southern. This adds up to the duration of a day and night of the demigods in the upper planetary systems.
— A.C. Bhaktivedanta Swami Prabhupāda
Gauḍīya Ācāryas
Viśvanātha Cakravartī Ṭhākura
Gauḍīya
Translation
In the middle of that island is a great mountain named Mānasottara, which forms the boundary between the inner side and the outer side of the island. Its breadth and height are 10,000 yojanas. On that mountain, in the four directions, are the residential quarters of devatās such as Indra. The wheel of the chariot of the sun-god, making up a year, going around Meru, travels on the top of the mountain with northern and southern courses, called the day and night of the devatās.
Because Mānasottra Mountain is circular, there are two varṣas, one either side of it, also of circular shape. “By days and nights of the devatās” means with northern (from winter to summer equinox) and southern courses (from summer to winter equinox) of the sun.
My note
Source: vedabase.io